Cats may have some strange behaviors when they see the mirror, such as fighting, burping or rubbing against the mirror, but this is not because they are crazy when they see the mirror. This behavior is often caused by them interacting with the "other cat" they see in the mirror. When cats see a mirror, they may recognize their own reflection, but because their brains are structured differently, they may not understand that it is their own reflection. Instead, they may think they are seeing another cat and try to interact with it. This can cause them to behave strangely, but it doesn't mean they're crazy.
In addition, some cats may feel fear or uncertainty about mirrors, and may choose to avoid or hide away Mirror. In this case, their behavior may also become strange. Overall, cats may behave strangely when they see a mirror, but that doesn't mean they're crazy.
