Cat’s mouth smelly and bleeding may be caused by feline stomatitis, oral ulcers, calicivirus infection, etc. When cats are infected with calicivirus, they will experience symptoms such as salivation, loss of appetite, weight loss, and lethargy. When a cat suffers from oral ulcers, he will also experience symptoms of a foul-smelling mouth and even bleeding. ​​​​​​

Lack of vitamins in the body can cause bad breath. There are many kinds of vitamins, among which vitamin B is very important for cats. Cats that eat meat but not fruits and vegetables for a long time cannot supplement vitamins and fiber. Therefore, cat owners can feed their cats some fruit and vegetable foods rich in vitamin B in their daily life, such as carrots, grapes, spinach, etc.