I never thought she might hate the pine, we like that it keeps the box smelling fresher but if Tortilla won't use the box then the house doesn't smell fresh! She is low on litter so I will see what else there is.

Pam- She went to the vet just a short while ago and he thought it was the pellets not a UTI. Would she have one if she is definitely using the box, just not all the time?

She is an amazing cat if we can just solve this stinky problem!