If your cat has changed their toilet habits and won't use a litter tray, there is likely to be an obvious reason. Even if they have now started to go elsewhere in the house. Click on the link for the most common causes and some solutions to try.
Bad breath in pets is NOT normal. Your pets teeth should be white, bright and beautiful. If they aren't its an indication of a health risk in the making. Periodontal disease is the most frequently occurring clinical condition in dogs and cats.