Indoor cats generally need fewer calories; kittens need more per pound than adults.

Kittens

Kittens grow fast and usually need 2.5× RER; offer multiple small meals and plenty of water.

Adults

Neutered indoor adults often maintain on 1.0–1.2× RER; outdoor active cats may need more.

Seniors

Monitor muscle mass and hydration; discuss any weight changes with your vet.