Smokey and Prada visited the vet 2 weeks ago. Checked negative for Feline Leukemia and HIV. Dected roungworm in fecal analysis. Vet said it is pretty common in kittens. They have been dewormed. My husband took their "poopoo" for analysis again this morning--Negative. We are starting introducing them to our older cat.Of course, Miss Ethel is old and sets her way, Besides she was the only cat for years in the house. Well, we will see how she copes with the new comers.