If your American Bully is not eating, not drinking, and only sleeping, it's often a sign of illness such as a cold or fever. It's important for owners to take their dog's temperature. However, it could also be due to a lack of stimulation and boredom. Try taking your dog for a walk. If your dog also has symptoms like vomiting or diarrhea, they might have gastroenteritis. If the dog has fever, eye or nasal discharge, and diarrhea, be aware of the possibility of canine distemper or parvovirus.

Reasons Why Your American Bully is Not Eating, Drinking and Only Sleeping and Solutions
There are several reasons your American Bully might be exhibiting these symptoms. Here's a breakdown of potential causes and what you can do:
1. Cold or Fever
If your dog suddenly stops eating, becomes lethargic, has a dry nose, and an abnormal body temperature, they might have a cold or a fever. You should measure your dog's temperature. If your dog has a cold, you can give them a half dose of children's cold medicine and keep them warm. If your dog has a fever, they need anti-inflammatory medicine, you can also gently apply alcohol to their paw pads and belly to help lower their temperature.
2. Boredom and Lack of Stimulation
Lethargy and loss of appetite can also stem from boredom. If your dog isn't getting enough mental and physical stimulation, they might become disinterested in food and sleep excessively. This often happens when owners don't spend enough time playing with their dog. Try taking your American Bully out for walks, engage in some exercise, and spend quality time to make their life more fun. Once their life becomes more engaging their appetite and energy levels are likely to return to normal.
3. Gastroenteritis
If your American Bully suddenly stops eating, sleeps more, and also has vomiting and diarrhea, they might have gastroenteritis. If this is the case, keep your dog off food and water for a day. After that give them anti-inflammatory medicine, two hours later, feed them some probiotics. If your dog's gastroenteritis symptoms don't improve after three days, you should take them to a vet for treatment.
4. Canine Distemper and Parvovirus
Refusal to eat and excessive sleeping can also indicate serious diseases like canine distemper or parvovirus. These illnesses often come with other symptoms like eye and nasal discharge, repeated vomiting and diarrhea, and fever. You can buy canine distemper and parvovirus test kits to test your dog. If your dog tests positive for distemper or parvovirus, they need immediate veterinary attention.