Cat litter?

[HappyHollyDays]

Glad you like it and yes a proper scoop is essential. Can't say I've ever thought it smelt of pesto though.

 

[Baydale]

This is really good, incredibly absorbent and great value, neutralises the smell too:

https://www.diversefarming.co.uk/cat-litter

 

[C1airey]

Another vote for recycled paper - we used to love it. We use wood pellets now as doubles up for horse too, but never noticed much smell with the paper. Raw diet has also helped lots with the smell.

But... pesto? What exactly have you been putting on your pasta all this time?