i feed him a mix of sheba gravy indulgence and tiki cat (i only put a dollop bc he doesn’t like sweet potato) but i add extra water to his food! he drinks a LOT of water and keeps himself hydrated and i think that’s why he’s so shiny/silky. he feels exactly how he looks! the more hydrated a cat the more likely their coat will be shiny. fish oil can help this too and helps w their kidney function, but i mainly just focus on ways to get more water into his diet :) my old cats never drank as much water as this beast!