i have a quaker and he is an adult. he has never plucked his feathers before until today. i hear him banging his beak against his cage and i go to see what was wrong and his chest was filled with blood. i soon discovered he was bitting himself and also on his shoulder he plucked some feathers.
the only change i did to his cage was yesterday i gave him a new water bowl and since this happened today, i now replaced the new water bowl with the old one as i have heard that changing the environment of a bird can cause stress. i don't know what else it can be. please help! thank you.