The reasons why the cat does not poop after changing the cat litter:

1. The cat is not used to it. If the cat litter is made of a different material than before, the cat will be a little uncomfortable and may not know where to go to the toilet for a while.

2. Cats don’t like new cat litter. If your cat doesn't like the smell or texture of the litter, it's very likely that the cat won't be willing to eliminate in the litter box.

3. The quality of the new cat litter is too poor. Some cat litter is of poor quality and contains a lot of dust, which can cause cats to cough and sneeze, so cats will refuse to poop in such cat litter.

Solutions for cats that stop pooping after changing cat litter:

1. Change the cat litter step by step. Just like changing cat food, you can mix new cat litter and old cat litter together and replace them step by step.

2. Choose cat litter that your cat likes. It is best to choose unscented cat litter, which should also feel soft to the feet so that the cat can scratch it.

3. Choose high-quality cat litter. Owners should not be greedy for cheap. It is best to choose cat litter from some big brands, so that the quality is guaranteed.