I have noticed this for a while now how my cat will sometimes eat little pieces of litter on the floor. Is that normal? It's the tidy cats crystal blends non-clumping litter. Is it anything to be concerned about? She doesn't eat it out of the litter boxes, she will just eat them randomly off the floor. I keep sweeping those areas multiple times a day to prevent it, but litter keep getting on the floor. Anyone else's cat do this?