After having a bowel movement my cat sometimes rubs her behind on the floor, growls like she is in pain, and leaves a "skid mark" of poo on the floor. She has recently been treated for roundworms, giardia (sorry about the spelling) and the vet also checked her anal glands and stated everything was fine. After the antibiotic treatment she has much more solid and normal poops. So why is she still doing this? ps. she is a rescued hurrican katrina kitty.