The reasons why cats scratch the quilt crazily:

1. There may be some smell on the quilt, and the cat instinctively wants to bury the smell by burying animals that poop.

2. If the forelimbs are exchanged for scratching, it may be that the smell on the quilt has aroused the cat's curiosity and wants to dig out to find out.

3. It may be a symptom of the cat grinding its nails. At this time, the cat needs to prepare nail grinding tools for the cat.

4. It may be that when the claws are uncomfortable, the cat will frequently scratch the quilt.