Grain-Free Cat Food Ingredients to Avoid (UK Labels)
‘Grain-free’ on the front of the bag does not guarantee a good recipe — some of the worst offender foods in the UK market are technically grain-free while being stuffed with cheap plant protein.
Red flags hiding behind the grain-free claim
- Pea protein / pea flour as a top-3 ingredient — cheap plant protein that inflates the analysis panel without feeding your cat.
- ‘Meat and animal derivatives’ (unnamed) — legally variable quality species and cuts.
- Added sugar, caramel or syrups — pure palatability tricks, useless nutrition.
- Excessive plant starches (potato, tapioca) beyond 15–20% of the recipe.
- Vague ‘animal fat’ without a named source.
What a good label looks like
A quality grain-free recipe opens with named meat (e.g. ‘fresh chicken 40%’, ‘dried chicken 25%’), names every animal source, and lists specific supplements rather than a wall of preservative E-numbers. If the carbohydrate maths adds up above roughly 25% of dry matter, keep shopping.
Frequently Asked Questions
Is pea protein bad for cats?
In small amounts, no. As a primary protein source, it is a problem — cats need amino acids from animal tissue, and plant protein dilutes the biological value of the whole diet. Watch for foods where peas appear multiple times in the list (split, protein, fibre).
Are carbohydrates bad for cats?
Cats have no dietary requirement for carbohydrate, but moderate amounts are well tolerated. The concern is excess: chronically high-carb diets are linked with obesity and may stress glucose regulation in predisposed cats.
What does ‘derivatives’ actually mean?
It covers offal, bone and trimmings from unspecified species. Named derivatives from a single species (e.g. ‘chicken derivatives’) are acceptable; the unnamed version is where quality becomes a lottery.
Are preservatives in dry cat food dangerous?
Modern mixed tocopherols (vitamin E) preservatives are safe. Older BHA/BHT preservatives are falling out of favour — most premium UK foods no longer use them.
