When pet stay overnight, you have to feed them! Always feed them once immediately. Then feed them once or twice a day. When you feed a pet, check its food level again. If it was really hungry, it'll empty its bowl immediately and you'll want to refill it again. I start with the cheapest food, then the next cheapest, to use up those supplies since they are there. But once those are gone, I only buy the best food - it helps a pet be happier and to stay full for longer.

guinea pig:
poor - 3
medium - 5
best - 8

rabbit:
poor - 3
medium - 5
best - 8

budgie:
poor - 3
medium - 5
best - 8

cat:
poor - 5
medium - 8
best - 12

dog:
poor - 5
medium - 8
best - 12

horse:
poor - 8
medium - 12
best - 18

horse market:
horses cost $5,000 each

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Paws and Claws - Pet Vet Review