The reasons why cats exhale smelly gas:

1. It may be due to oral disease. When a cat eats too much meat and the residue ferments in the mouth, it will emit a bad smell, or the cat suffers from stomatitis, periodontal disease, etc., which can also cause bad breath.

2. It may be indigestion. When a cat has gastrointestinal disease, constipation, hairball syndrome, etc., it will affect gastrointestinal digestion and cause odor to come out of the cat's mouth through the esophagus.

3. It may be a lack of vitamins. Cats will suffer from bad breath when they are deficient in vitamin B. Long-term deficiency of vitamin B will also cause cats to suffer from oral diseases.

Solutions to the smelly breath exhaled by cats:

1. To treat the cat’s oral problems, you can give the cat a pet-specific mouthwash. Pay attention to helping the cat clean its mouth after eating meat.

2. Give cats hair removal cream or cat grass regularly. You can feed them probiotics to regulate their gastrointestinal tract. At the same time, let your cats drink more water.

3. Supplement the cat with vitamin B regularly. You can also feed the cat some meat and vegetables appropriately to obtain vitamins through food.