Description : Their feathers mostly puff up at night and then they look super fat. Then in the day they just flatten up and then my budgies look super skinny. It looks like they are trying to warm up. But I'm not really sure. Thx for the answer!
Last Answer : Budgies normally puff up their feathers. It could be that since night time temperatures are lower, your budgie is puffing up because it's cold. Puffing up their feathers traps warm air and helps ... s no problem. If you notice any behavioral changes, contact an avian vet and discuss the situation.