Does a cat squatting like a hen necessarily mean it's uncomfortable?
1. The cat may be feeling unwell. At this time, the cat will be very lethargic, less sensitive to its surroundings, and may curl up in one place, unwilling to move or eat. If this occurs, it's best to take the cat to the vet for examination and appropriate treatment as soon as possible. 
2. When a cat has gastrointestinal upset or abdominal pain, it may adopt a crouching posture. However, some cats also adopt this posture while resting, and in this case, the cat will not appear lethargic. When you try to play with it, it will definitely come and play with you enthusiastically.
3. In addition, cats will also adopt a hen-like squatting posture to keep warm when they feel cold. If your cat adopts this posture, be sure to observe its mental state and appetite. If its mental state and appetite are affected, the cat may be sick.
