I have got a big cat today what do i do?

if your looking for dry food.. i get my cats the pro-plan formula from purina its supposed to be really good for them and they say on the package what it can improve on the cat but if your looking for wet food then get fancy feast. my cats like the fish stuff like salmon or shrimp. i have dry food out for my cats 24/7 and then i split a can of wet food between the two twice a day hope i helped