Lol Ahmed prolly looking for oil under the substrate. It is what they do.. Don't worrie!!
You have a famous pet hole
or at least you will be getting one
Enjoy the digging. It is quite funny to watch. I think it is spelled burried. But as my native tongue is not english, I think you should know better
On the other hand, that is a good sign. means 1 he can burrow 2 he's feeling relaxed..