The reasons why cats poop on the edge of the litter box:

1. The litter box is too dirty. Cats are very clean animals. When the owner does not clean the litter box for a long time, the cat will not be willing to enter the litter box and will poop on the edge of the litter box.

2. The cat litter box is too small. If a cat cannot move around in a small litter box, it is likely to poop outside the litter box.

3. The cat is taking revenge on its owner. When the owner does something that makes the cat unhappy, the cat will poop on the edge of the litter box or even on the owner's bed in a revengeful mood.

Methods to prevent cats from pooping on the edge of the cat litter box:

1. Clean the excrement in the cat litter box promptly, clean the cat litter box regularly, and keep the cat The cleanliness of the sand basin.

2. Choose a litter box of appropriate size. Normally, the volume of the litter box should be more than 2 times the volume of the cat itself, and the minimum should not be less than 2/3.

3. Owners should not beat or scold the cat often, let alone always ignore the cat. However, if the cat is too naughty and does not listen to discipline, the owner should also punish it appropriately to let it know that excreting everywhere is wrong.