There’s no best food diet for a dog or a cat, contrary to what all the adverts claim. Every pet has unique needs and tastes, so you will want to find your pet’s best diet. Also, bear in that expense doesn’t necessarily mean quality.
You will find some inexpensive diets online with years of rigorous scientific testing showing their benefits. Still, there are some very expensive options without any vital nutrients or that are not based on sound medical advice.
Generally, bigger manufacturers use more stringent quality control protocols, use expert food scientists and nutritionists’ services, and work to widen our collective nutrition knowledge via research. However, smaller companies could exhibit less control over ingredient quality and carry out less laboratory testing. They may not also want to use the services of full or part-time veterinary nutritionists.
A crucial tip to always keep in mind is that if a product’s advert seems too good to be true, it probably is. Be cautious when the manufacturer cites research or papers they can’t provide sources for or makes substantiated claims.