Yes it is a small pet toilet I bought it for my rabbit But this size only works for when they are still small. Definitely dont recommend getting the smaller one unless you can toilet train a guinea pig or animal simular of size as it is too small. It works for now for my bunny as he is still growing. If anything if it is a must to get a toilet as such for a bunny just go for the bigger size. But i strongly reccomend just getting a tub big enough for a fully grown bunny to turn around in and just fill it up with hay and use that. There are clips at the back and both of them dont clip on well to the cage. Only one can be clipped at a time otherwise it becomes elevated and unstable.

HappY Camper

I have just bought the small litter pan for the rat cage. It’s the perfect size and helps the rats to keep the cage clean longer.