Cats will use cat litter from the first month after they are born. This is the cat’s survival instinct. Even if the cat litter is replaced, the owner does not have to worry. The cat will adapt to it after waiting for about 1 day; if it is 3 days after replacing the cat litter, The cat is still not used to it. It is recommended that the owner check the new cat litter. It may be that the dust in the cat litter is too large and the smell is too strong, which makes the cat dislike it and cannot go to the cat litter to excrete.