Dull Coat, Hairballs and Shedding in Cats: The Dietary Connection

A healthy cat should have a coat that is soft, glossy, and relatively low-maintenance. If your cat’s fur looks dull or feels coarse, if they are shedding more hair than feels normal, or if hairballs have become a frequent and distressing occurrence, diet is very often part of the explanation — and in most cases, one of the more straightforward things to address.

This guide covers the dietary causes of poor coat health and excess hairballs, how to recognise when the problem goes beyond nutrition, and when our hydrolysed salmon recipe is the right choice for your cat.

Signs of Poor Coat Health in Cats

Coat condition reflects what is happening internally. Signs to look for include:

• Dull, flat, or greasy-looking fur that lacks its natural sheen
• Coarse or brittle hair texture
• Excessive shedding beyond normal seasonal variation
• Dry, flaky, or itchy skin underneath the coat
• Bald patches or areas of visible thinning
• Frequent over-grooming or, conversely, neglect of grooming
• Hairballs more than 2–3 times per month

What Causes a Dull Coat in Cats?

Omega Fatty Acid Deficiency

The most common nutritional cause of a dull cat coat is insufficient omega-3 and omega-6 fatty acids. These essential fats are required for the production of sebum — the natural oil that gives fur its sheen and keeps skin properly hydrated. Without adequate omega fatty acids, skin dries out, hair becomes brittle, and the coat loses its lustre regardless of how much protein is in the food.

Omega-3 is particularly important. It is found in high concentrations in oily fish such as salmon, and it is the nutrient most commonly lacking in dry cat foods that do not use fish as a primary ingredient.

Biotin and Zinc Deficiency

Biotin (vitamin B7) and zinc are both critical for coat and skin health. Deficiencies in either can cause hair loss, flaking skin, and poor coat texture — even in cats eating a food that appears nutritionally complete. The bioavailability of these micronutrients matters as much as whether they appear on the ingredient label.

Poor Protein Digestibility

Coat and skin repair require a constant supply of amino acids from dietary protein. If a cat cannot properly absorb the protein in their food — because it is from a low-quality source or has poor digestibility — the building blocks needed for hair growth and skin maintenance are simply not available, regardless of the protein percentage listed on the pack.

Food Intolerances Manifesting Through the Skin

An immune response to a dietary protein can present through the skin as well as the gut. Itchy skin, over-grooming, and poor coat condition are frequently dietary in origin, and often resolve when the triggering protein is removed. Hydrolysed protein is particularly effective here because the protein fragments are too small to provoke an immune reaction. For a full explanation of the hydrolysis process and how it works across the Ultimate Plus Cat range, see our complete guide to hydrolysed cat food.

Understanding Cat Hairballs

Hairballs are a normal part of cat life. Cats groom themselves extensively, and some ingested hair will naturally be regurgitated. Once or twice a month in an adult cat is broadly within the normal range.

The problem arises when hairballs become more frequent, more distressing to bring up, or when a cat repeatedly retches without successfully producing one.

The connection between coat condition and hairball frequency is direct: the more a cat sheds, the more hair they ingest during grooming, and the more hair accumulates in the digestive tract. Addressing coat condition and excessive shedding at the dietary level is therefore the most effective long-term approach to reducing hairball frequency.

The second factor is gut motility — how efficiently the digestive system moves ingested hair through and out of the body. Specific dietary fibres, particularly beet pulp and cellulose, stimulate intestinal movement and help hair pass through the gut rather than accumulating and being regurgitated.

When Will Our Skin, Coat and Hairball Recipe Help?

Our Hydrolysed Cat Food — Skin, Coat and Hairball Control uses hydrolysed salmon as the primary protein — naturally rich in omega-3 fatty acids — with added omega-6, biotin, zinc, beet pulp, and cellulose to address both coat quality and hairball management from the inside out.

This recipe is likely to produce a meaningful improvement if your cat:

• Has a consistently dull, dry, or coarse coat with no diagnosed medical cause
• Is shedding excessively beyond normal seasonal variation
• Produces hairballs more than 2–3 times per month
• Has dry or flaky skin alongside coat issues
• Shows signs of dietary skin sensitivity — itching, over-grooming, or patchy coat without a confirmed skin condition
• Has not responded to omega supplements added to their current food

In independently conducted 2025 feeding trials, 95% of owners reported a visible improvement in coat condition. Coat changes typically become visible within 6–8 weeks — this is the time it takes for new hair growth to reflect dietary improvements. Hairball frequency usually reduces within 3–4 weeks as gut motility improves. No prescription is required.

When to See a Vet

While diet is the most common driver of coat and hairball problems, certain signs indicate a condition requiring veterinary assessment rather than a dietary change alone:

• Bald patches or patchy hair loss — could indicate ringworm, mites, or a hormonal condition that needs diagnosis and treatment before diet is changed
• Red, inflamed, crusted, or weeping skin — requires veterinary assessment and may need topical or systemic treatment
• Repeated retching without successfully producing a hairball — could indicate a gastrointestinal obstruction, which is a veterinary emergency
• Hairballs accompanied by lethargy, loss of appetite, or constipation — signs that hair may be causing a partial blockage
• Sudden onset of excessive grooming or rapid coat deterioration — can signal pain, stress, or systemic illness rather than a nutritional issue
• No improvement in coat condition after 10–12 weeks on an appropriate diet — warrants investigation for thyroid conditions or other underlying causes

Transitioning to the Skin, Coat and Hairball Recipe

• Days 1–3: 75% old food, 25% Skin, Coat and Hairball Control
• Days 4–6: 50% old food, 50% Skin, Coat and Hairball Control
• Days 7–9: 25% old food, 75% Skin, Coat and Hairball Control
• Days 10–14: 100% Skin, Coat and Hairball Control

Be patient when watching for coat improvements. Unlike digestive changes, coat quality reflects hair that grew after the diet change, so visible results take longer to appear. Most cat owners start to see a clear difference between weeks 6 and 8.

Frequently Asked Questions

Does my cat need a prescription for this diet?

No. Our Skin, Coat and Hairball Control recipe is available to buy directly without a vet prescription.

My cat also has digestive issues — which recipe should I start with?

If digestive symptoms are the more pressing concern, start with the Digestive Care recipe. Coat quality often improves as digestion stabilises and nutrient absorption increases. If coat issues remain after 8 weeks, switch to this recipe. See our guide to sensitive stomach in cats for more detail.

How often is too many hairballs?

Once or twice a month is broadly normal for an adult cat. More than 3–4 per month, or any instance where your cat retches for a prolonged period without producing a hairball, should be investigated — first with diet, and with a vet if it continues or worsens.

Can omega supplements added to another food achieve the same result?

Omega supplementation can help with coat shine, but it does not address protein digestibility, biotin and zinc levels, or the gut motility support provided by beet pulp and cellulose. A purpose-formulated hydrolysed recipe addresses all of these together and delivers measurably higher nutrient absorption overall.

My cat also has urinary problems — which recipe takes priority?

Urinary issues should generally take priority as they can escalate quickly. Our guide to FLUTD and urinary crystals in cats explains when the Urinary Health recipe is appropriate.

Editorial note: This article is written for informational purposes only, based on independently conducted feeding trials and consultation with UK veterinary nutritionists. It is not a substitute for professional veterinary advice. Always consult your vet if you have specific concerns about your cat’s health.

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