Scratchy bum

My poo and wee box is usually full of the same stuff: it's grey, and my human takes my wees and poos out of it.
I'm not sure why he does this, but humans are strange.

I went to do a wee yesterday though, and it's different grey stuff in the box than usual.
I don't like it. It's scratchy on my bum.

I shall complain to my human until he gets the message.

I want the usual grey stuff back in my wee and poo box.