Source Focus HF (Hoof)

FOCUS HF (Hoof) provides specialized nutritional support for horses with poor hoof condition

Got a horse with poor hoof growth or weak texture that needs targeted nutritional support?

Reviewed by Ann Pruitt, InfoHorse.com · Updated April 2026

FOCUS HF (Hoof) by SOURCE micronutrients product label and guaranteed analysis

"FOCUS HF"(HOOF) by SOURCE, INC.
FOCUS HF (Hoof) provides specialized nutritional support for horses with poor hoof condition, for superior hoof growth, texture, and strength.

FOCUS HF (Hoof) ... Has What's Missing From Any Other Hoof Product!
A sound hoof is the necessary foundation for an active horse and requires a wide range of nutrients for optimum strength and resilience.

FOCUS HF provides not only key nutrient building blocks such as biotin, methionine, lysine, chelated trace minerals (including zinc and copper), viable yeast culture and lecithin phospholipids . . .
. . . it includes the legendary SOURCE® micronutrients to make it all work!

Hooves are composed of living tissue that require a wide range of nutrients to grow strong, resilient and hard. A deficiency of any of these key nutrients may lead to weak, crumbly hoof walls that grow slowly and won't hold horseshoe nails. FOCUS HF provides the horse with a unique broad spectrum of micronutrients from SOURCE. These nutrients include at least 60 minerals and trace elements in an organic, highly bioavailable form. In addition, seaweeds contain other natural bio-active compounds and co-factors which may be missing from your horse's diet. These micronutrients are synergistic with all the other ingredients in FOCUS HF and will help to increase their effectiveness.

Feeding Instructions

Provide good quality hay and grain, with protein and carbohydrate levels appropriate for the age and demands of the horse; a balanced calcium / phosphorus ratio, an effective parasite control program, fresh water at all times, free access to salt, a good dental care program Feed Focus HF everyday, including race and competition days. Mix one level measure (included in the container) ( 1.5 oz.)(42 gr.) of Focus HF with feed per day. Amount based on 1,000 lb. (450 kg) body weight. Adjust accordingly. Do not exceed recommended feeding levels.

The Source Guarantee

We want every person to have the opportunity to see for themselves the effectiveness of the Source micronutrients found in all of our products. If you are not satisfied with any of the products for any reason, your money will be refunded in full - no strings attached. (Simply enclose proof of purchase.)

What Makes Our Company Different?

More than two decades ago SOURCE president and founder, Susan Domizi was competing on her eventing horse, Hull, with hopes of being on the US Equestrian Olympic Team. "My horse [Hull] had hoof problems and couldn't maintain his body weight. He received the finest feeding program and veterinary care available. I suspected a nutrient deficiency and set out to find something to help him." She found a great deal of Norwegian and Japanese research on seaweeds that scientists and agriculturists here had been able to duplicate.

In addition to using information learned while earning a degree from Columbia University in New York, she studied all available data to determine what the American studies had missed. She used this information as a starting point for developing other approaches..

By trying different kinds of seaweeds, different blends, different methods of processing and constantly analyzing the findings she came up with a finely ground, dry mixture that she put in her horse's food. Her horse began to thrive.

And that was the first serving of the product that was later to become SOURCE

Focus HF Sounds Great! How Do I Order?

Focus HF is available for your horse in a convenient 3.5 lb. size, which will last one horse for 37 days. It is also available in an economical bulk easy-open 25 lb. size (lasts one horse for 8 months) SOURCE products are widely available at your local feed and tack stores, through online catalogs or web stores, or directly from SOURCE-- just visit our Shop area at 4Source.com for a complete listing.

FOCUS HF (Hoof) provides specialized nutritional support for horses with poor hoof condition, for

What makes FOCUS HF (Hoof) different from an ordinary biotin supplement?

Most hoof products lean on a single nutrient and stop there. FOCUS HF (Hoof) by SOURCE micronutrients LLC pairs the recognized hoof building blocks — 10 mg of supplemental biotin, methionine, lysine, and chelated zinc and copper — with the company's signature SOURCE® dehydrated-seaweed micronutrients "to make it all work." The 10 mg of biotin per serving is many times more than the horse synthesizes naturally through intestinal microbes, and the seaweed base supplies the broad spectrum of trace nutrients a hoof needs to actually use that biotin. That whole-system approach is why the label promises "what's missing from any other hoof product."

Healthy horse hoof showing strong wall growth supported by SOURCE Focus HF

Who makes FOCUS HF, and what is the SOURCE story?
SOURCE was founded by Susan Domizi, a Columbia University-educated horsewoman who developed the original seaweed micronutrient mixture to rescue her eventing horse, Hull, from chronic hoof problems and poor weight maintenance that good vet care and feed could not fix. Drawing on Norwegian and Japanese seaweed research, she created a finely ground, dry blend of processed seaweeds; the company was formally established in December 1975. SOURCE micronutrients LLC operates from 101 Fowler Road, N. Branford, CT 06471, and is a proud founding member of the NASC, audited and certified to display the NASC Quality Seal.

Underside of a horse hoof illustrating hoof structure for SOURCE Focus HF Hoof supplement

What is actually in the formula?

FOCUS HF (Hoof) combines dehydrated seaweed meals, dehydrated alfalfa meal, corn distillers dried grains with solubles, DL-Methionine, L-Lysine, lecithin, zinc methionine complex, zinc proteinate, copper proteinate, biotin, yeast culture, and natural flavoring. The guaranteed analysis per 1.5 oz serving delivers 20% crude protein, 7.4% methionine, 3.8% L-Lysine, 10 mg biotin, 225 mg zinc, 79 mg copper, and 9 mg iodine. Using chelated (proteinate and methionine-complex) trace minerals helps the zinc and copper absorb more reliably than basic mineral salts.

Close-up of a resilient horse hoof wall and heel for SOURCE Focus HF

How do you feed it, and how long does a container last?
Feeding is simple: mix one level measure — 1.5 oz, or 42 grams — daily into feed for each 1,000 lb of horse body weight, every day including competition days. The 3.5 lb size works out to roughly a 37-day supply, while the 25 lb size lasts about 8 months for a single average horse, making the larger size the value choice for a barn that commits to the full hoof-growth cycle.

Who is FOCUS HF (Hoof) for?

A sound hoof is the necessary foundation for an active horse, and it requires a wide range of nutrients for optimum strength and resilience. FOCUS HF (Hoof) targets horses with poor hoof condition — thin walls, cracking, chronic chipping, or slow, brittle growth — and any performance or pleasure horse whose feet need to hold a shoe and stay sound through a demanding season. Because hoof grows slowly, owners typically commit to several months of daily feeding to see new, healthier wall grow down from the coronary band.

How do you order, and what is the guarantee?
FOCUS HF (Hoof) is available directly from SOURCE at www.4source.com, with the 3.5 lb size listed at $37.23 and the 25 lb size at $212.02. Order or ask questions by phone at (800) 232-2365 or (203) 488-6400, or, Monday through Friday 9 am to 5 pm Eastern. SOURCE was the first nutritional supplement sold in the horse industry to ever offer a no-questions-asked, money-back guarantee: "If you are not satisfied, your money will be refunded in full – no strings attached."

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The Solution Section (FAQ)

What is FOCUS HF — and what specifically does it support?

Per SOURCE, INC.: FOCUS HF (Hoof) provides specialized nutritional support for horses with poor hoof condition — for superior hoof growth, texture, and strength.

Per the company: "A sound hoof is the necessary foundation for an active horse and requires a wide range of nutrients for optimum strength and resilience."

How is FOCUS HF different from SOURCE Original — same company?

Per SOURCE, INC.: FOCUS HF and SOURCE Original are distinct products in the SOURCE catalog. Original / Pelleted Original is the broad-spectrum micronutrient supplement; FOCUS HF is a hoof-specialized formulation that combines:

Key building-block nutrients: biotin, methionine, lysine, chelated trace minerals (including zinc and copper)
Viable yeast culture + lecithin phospholipids
Plus the legendary SOURCE® micronutrients to make it all work

Why does my horse need biotin, methionine, lysine, and chelated trace minerals?

Per SOURCE: hooves are composed of living tissue requiring a wide range of nutrients to grow strong, resilient, and hard. "A deficiency of any of these key nutrients may lead to weak, crumbly hoof walls that grow slowly and won't hold horseshoe nails."

FOCUS HF's micronutrient profile includes at least 60 minerals and trace elements in an organic, highly bioavailable form. Seaweeds in the formula contain natural bio-active compounds and co-factors that may be missing from the horse's diet.

What are the feeding instructions?

Per SOURCE:

Provide good-quality hay and grain with protein and carbohydrate levels appropriate for age and demands
Balanced calcium / phosphorus ratio
Effective parasite control program; fresh water always; free access to salt; good dental care program
Feed FOCUS HF every day, including race and competition days
Mix 1 level measure (1.5 oz / 42 g) per day based on 1,000 lb (450 kg) body weight; adjust accordingly
Do not exceed recommended feeding levels

What's the SOURCE Guarantee?

Per SOURCE: "We want every person to have the opportunity to see for themselves the effectiveness of the SOURCE micronutrients found in all of our products. If you are not satisfied with any of the products for any reason, your money will be refunded in full — no strings attached. (Simply enclose proof of purchase.)"

Who is Susan Domizi — and how did SOURCE come to be?

Per SOURCE, INC.: more than two decades ago, Susan Domizi (SOURCE president and founder) was competing on her eventing horse Hull, with hopes of being on the US Equestrian Olympic Team. Per Susan: "My horse [Hull] had hoof problems and couldn't maintain his body weight. He received the finest feeding program and veterinary care available. I suspected a nutrient deficiency and set out to find something to help him."

She found Norwegian and Japanese research on seaweeds — and that founding work led to the SOURCE micronutrient line.

How do I order FOCUS HF?

Per SOURCE, INC.:

Phone: 800-232-2365
Email: [email protected]
Product page: http://www.4source.com/product/source-focus-hf/

Pricing as quoted is subject to change due to economic factors and supplement-market conditions — confirm current pricing with SOURCE directly when ordering.

What is FOCUS HF (Hoof) by SOURCE?

FOCUS HF (Hoof) is a specialized equine nutritional supplement made by SOURCE micronutrients LLC. It provides nutritional support for horses with poor hoof condition, targeting superior hoof growth, texture, and strength. It combines classic hoof nutrients like biotin, methionine, and lysine with SOURCE's signature seaweed-based micronutrients.

How is FOCUS HF different from a plain biotin product?

Plain biotin supplements supply a single nutrient, but a hoof needs a full spectrum of building blocks to use that biotin. FOCUS HF (Hoof) pairs 10 mg of supplemental biotin with methionine, lysine, and chelated zinc and copper, plus the SOURCE micronutrients the company describes as the ingredient 'to make it all work.' The product positions itself as having 'what's missing from any other hoof product.'

What are the main ingredients in FOCUS HF (Hoof)?

The ingredient list includes dehydrated seaweed meals, dehydrated alfalfa meal, corn distillers dried grains with solubles, DL-Methionine, L-Lysine, lecithin, zinc methionine complex, zinc proteinate, copper proteinate, biotin, yeast culture, and natural flavoring. The chelated forms of zinc and copper (proteinate and methionine complex) are chosen for better absorption than basic mineral salts.

How much biotin is in each serving?

Each 1.5 oz serving provides 10 mg of supplemental biotin. SOURCE notes this is many times more than the amount the horse already synthesizes naturally through its intestinal microbes, supplying a meaningful boost specifically aimed at hoof growth and integrity.

What is the guaranteed analysis per serving?

Per 1.5 oz serving, FOCUS HF (Hoof) guarantees 20% crude protein, 7.4% methionine, 3.8% L-Lysine, 10 mg biotin, 225 mg zinc, 79 mg copper, and 9 mg iodine. These figures reflect the formula's emphasis on the sulfur amino acids and trace minerals tied to keratin and hoof-wall strength.

How do I feed FOCUS HF to my horse?

Mix one level measure — 1.5 oz, or 42 grams — into the feed daily for each 1,000 lb of horse body weight. SOURCE advises feeding it every day, including competition days, so the supply of hoof-building nutrients stays consistent throughout the slow hoof-growth cycle.

What sizes does FOCUS HF come in and how long do they last?

FOCUS HF (Hoof) is offered in a 3.5 lb size, which is roughly a 37-day supply, and a 25 lb size, which lasts about 8 months for one average horse. The larger size is the better value for owners committing to a full hoof-regrowth cycle.

How much does FOCUS HF cost?

On the official SOURCE site, the 3.5 lb size is listed at $37.23 and the 25 lb size at $212.02. Because hoof improvement requires months of feeding, the 25 lb size lowers the per-day cost considerably. Always confirm current pricing directly with SOURCE.

Who makes FOCUS HF and where are they located?

FOCUS HF (Hoof) is made by SOURCE micronutrients LLC, located at 101 Fowler Road, N. Branford, CT 06471. The company was founded by Susan Domizi and formally established in December 1975, and it has specialized in seaweed-based micronutrient supplements ever since.

What is the story behind SOURCE?

Founder Susan Domizi, educated at Columbia University, developed the original seaweed micronutrient mixture to help her eventing horse, Hull, overcome chronic hoof problems and weight-maintenance issues that even excellent veterinary care and feed could not resolve. Drawing on Norwegian and Japanese seaweed research, she created a finely ground dry blend of processed seaweeds, and word-of-mouth demand built the company. SOURCE describes its formula as 'Often Imitated, Never Duplicated.'

What are SOURCE micronutrients?

SOURCE micronutrients are a finely ground, dry mixture of specially processed seaweeds that supply a broad, natural spectrum of trace nutrients. In FOCUS HF (Hoof), this seaweed base works alongside the added biotin, amino acids, and chelated minerals so the horse has the full range of co-factors a hoof needs to grow strong, resilient horn.

How long until I see results in my horse's hooves?

Hoof grows slowly from the coronary band down, so visible improvement takes time. Owners typically feed FOCUS HF (Hoof) daily for several months to grow new, healthier wall down the full length of the hoof. Consistency every day, including competition days, matters more than short bursts of feeding.

Which horses benefit most from FOCUS HF?

It's aimed at horses with poor hoof condition — thin or cracking walls, chronic chipping, or slow, brittle growth — and at performance and pleasure horses that need feet sound enough to hold a shoe through a demanding season. A sound hoof is the foundation for an active horse, and FOCUS HF targets the nutritional gaps behind weak feet.

Is FOCUS HF quality-certified?

Yes. SOURCE micronutrients LLC is a proud founding member of the National Animal Supplement Council (NASC) and is audited and certified to display the NASC Quality Seal. The NASC seal indicates the company meets the council's standards for quality control and labeling in the animal supplement industry.

Does FOCUS HF come with a guarantee?

Yes. SOURCE states it was the first nutritional supplement sold in the horse industry to ever offer a no-questions-asked, money-back guarantee. The promise reads: 'If you are not satisfied, your money will be refunded in full – no strings attached.'

How do I order FOCUS HF or ask questions?

You can order directly from SOURCE at www.4source.com, or contact the company by phone at (800) 232-2365 or (203) 488-6400, or by email at [email protected]. Customer service hours are Monday through Friday, 9 am to 5 pm Eastern, closed weekends and holidays.

Can FOCUS HF be fed alongside other SOURCE products?

SOURCE produces a family of seaweed-based micronutrient supplements for horses, and FOCUS HF (Hoof) is the formula focused specifically on hoof support. If you feed multiple SOURCE products or are combining supplements, contact SOURCE directly at (800) 232-2365 or [email protected] to confirm appropriate combined nutrient levels for your horse.