Cat bled a lot, then I saw this thing beside her, and she keeps shrinking into a corner; adopted stray, about three months old

Hello, since the photo you uploaded is blurry, the object in it cannot be seen clearly. But the cat bleeding heavily means the situation is serious; it is recommended to take it to a veterinary hospital promptly to find the cause and take effective treatment.

At the same time, the owner can carefully check which part of the cat is bleeding, and if possible stop the bleeding first to avoid excessive blood loss that could lead to shock or endanger its life.