What food should I feed my underweight 4-year-old cat to gain weight?

Question

Hey, my cat is almost 4 years old, spayed and is quite underweight. I’ve been feeding her Royal canin dry food and some other wet food brands and she eats normally. Can I know any specific brand food that could be better for her diet and help her gain weight? Pet's info: Cat | Persian | Female | spayed | 3 years and 8 months old | 6.62 lbs

Jenna Beyer, DVM, MBA, cVMA · Accepted Answer

I would recommend that you have Lily examined by a vet to see if there is a medical cause for her being underweight. Sometimes there can be low levels of protein being lost to the intestines or through the kidneys that will cause inability to gain weight. It may or may not be seen with other symptoms, like vomiting, diarrhea, or urinary symptoms. Baseline blood work and urinalysis is important, and if the protein is low then additional testing may be indicated.

What food should I feed my underweight 4-year-old cat to gain weight?

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