My african grey parrot keeps his eyes closed most of the time even when i stand in front of him he wont open them,he does eat a little bir. Pet's info: Bird | Unknown - Bird | Male

Without knowing if Jack is showing other symptoms of illness, it is hard to tell what is going on. Listless behavior, low energy, sleeping all the time and not eating or drinking as much are all very vague symptoms of illness and should be checked out by a vet to find the underlying causes. Infections, illness, injuries, parasites, nutritional issues, etc can all be possible causes. Keeping him warm and quiet, as well as providing easy access to food and water may help. If he is in a very loud or high-stress area, moving him somewhere quieter may also help him to relax and feel better, however if he continues to act unwell or doesn't perk back up, a vet exam is best.

If he has lost that much weight, he needs additional diagnostic tests including bloodwork and x-rays. He may have an underlying virus or liver disease that needs additional treatment. Also, he needs nutrition so need to have veterinarian instruct you how to crop feed him.

Unfortunately, with that information alone it doesn't really point to any one issue. If you just got your bird yesterday, it is likely he is still adjusting and may be scared or nervous. Making sure to keep him in a calm, quiet area of the house with access to food and water and letting him rest may help. If he continues to not want to move, eat, or drink for more than a day, then seeking veterinary care in person is best to check for health issues.