You are here:

Cats/bad breath


I have a black cat and he is a little over a year.  I noticed that is breath is kinda odd/bad. so I looked in his mouth and he has black round spots on the ruff of his mouth. it seems like he might have some black on the sides of his gums, but it was hard to tell because of his black fur. he is on a vegan diet and I give him some fresh foos, he likes kale, avocdo and pumpkin. these all all in small amounts not very often.

Thanks, Robert


Unfortunately cats are obligate carnivores and can't be healthy for too long on a vegan diet. There are amino acids and nutrients found in meat that aren't bio-available to cats in plant forms. If you would like to learn more about appropriate cat nutrition please check out - Dr. Lisa Pierson a veterinarian created this page to help pet parents understand the unique needs of their feline companions. If you would prefer not to make your cat's meat based food there are good quality canned cat foods that you could purchase.

The bad breath could be related to his inappropriate diet and impairments of organ function caused by the vegan diet, it also may be a dental issue. Either way this kitty needs to see a veterinarian immediately for a full blood panel and to have his heart and eyes evaluated for damage caused by his diet. The veterinarian should be made aware that this kitty has been on a vegan diet and for how long he's been getting these foods at the first appointment. If you have any further questions or concerns, please feel free to contact me again at any time. I'm more than happy to help in any way that I can.

Kind regards,



All Answers

Answers by Expert:

Ask Experts




I am the proud guardian of 5 mixed breed cats ranging from 12 weeks to 13 years old and one purebred ragdoll. I have 20+ years experience working with mixed breed cats from a variety of different situations. I have fostered cats/kittens with special needs/behavioral issues. I have rescued/rehabilitated/re-homed a variety of stray/abused cats. I can offer advice on managing feral cat colonies, rehabilitating strays and finding them forever homes. I can help you to determine whether a cat is stray or feral, there IS a significant difference. Improperly introducing a new cat/kitten can result in aggression between newly introduced cats because cats are territorial by nature and they don't like sudden changes in their environment. To learn more about a peaceful way to introduce a new cat into a home with other cats please check out my previous answers on this subject. Proper nutrition for cats can be confusing, I recommend checking out which was created by a veterinarian (Dr. Lisa Pierson) who takes a common sense approach to explaining feline nutrition. Cat behavior and instincts are different from those of humans, I can help you understand your cat's needs so that you can meet them adequately and have a balanced, psychologically and physically sound kitty. Cats vary in personality, energy level and intelligence, different approaches may be required to achieve results in terms of training and interaction with your feline companion. An intelligent, high energy cat must be kept busy or they will make their own fun. I am NOT a licensed veterinarian and I can't offer medical advice. If your cat is ill/injured my advice is always the same: get prompt medical treatment provided by a veterinarian. If finances are an issue I will try to find resources in your area that can help with medical costs or make other choices to ensure the welfare of your cat.


I have fostered feral and stray cats, rehabilitated and homed cats that many people recommended euthanasia for. I am willing to make an effort to do the research and ask questions because I care enough to find solutions to behavioral problems rather than giving up. I have an interest in the use of alternative therapies to help provide the best possible care for all cats and I can say in all honesty that I've seen some incredible things happen for some incredible cats and their human caregivers when the right alternative therapeutic modality is used by a qualified veterinarian with expertise and experience in the field.

I've earned my diploma as a veterinary assistant with honors.

©2017 All rights reserved.