A warm paw pressed into litter is not always harmless, especially when a sour or yeasty odor remains after the grains are gone. Pay close attention. Cats do pick up debris, but persistent odor can point beyond housekeeping to moisture, saliva, or inflamed skin between the toes. That difference matters. The smell may be faint at first, then rise after grooming, sleep, or a damp trip to the box.Yeas...More