6. Pee & Poo Indicators: Your animal's bathroom habits are an excellent barometer of health which is why its critically important for pet guardians to observe their pets' elimination behaviors. Frequent urination can indicate a variety of sneaky and serious health issues ranging from diabetes to urinary tract infection to kidney failure. In fact, in male cats blockage of the urinary tract can suddenly occur and your cat will be unable to urinate despite desperate attempts. If your litter box is out of sight, you will not notice these red flags. You must see how often your cat is visiting the box. Daily cleaning of the box to look for appropriate quantity of urine is essential, but in multi-cat households, it's harder to spot illness in a single cat through cleaning alone. Changes in bowel movements can indicate anything from simple parasitic infection to intestinal disease to gastrointestinal hemorrhaging. Black poo, poo with red blood or diarrhea that persists are all reasons to see the vet.