My older cat is stressed, vomiting, and not eating since we got a kitten.

It's probably more of a case of a rambunctious kitten than one trying to establish dominance (a very outdated theory). A few things you can try include giving kitten some extra play time to wear him out, making sure your older cats have places to hide and get away from the kitten (such as high up perches or separate rooms), making sure everyone has their own access to food, water, and litter, and using a pheromone diffuser or collar. Pheromone diffusers help by releasing a calming pheromone and are great for inter-cat stress and issues.

I would recommend trying to keep the kitten and older cat separated for now. Than slowly introducing them back to each other. I would make sure that the older cat has a litter box and food some place away from the kitten that way he will feel more comfortable eating. It is very important cats eat every day. If Niko is not eating anything he needs to go see a vet. You can try feliway which is a cat pheromone to help decrease stress in the house too. The reason Niko is acting out is due to stress in the house

Hello, sorry to hear about Hikaru. I would actually ensure that there isn't anything else going on with your eldest. Some cats can have a hypersensitivity or an allergy to certain types of food. Typically, these kinds of allergies can be treated by changing the type of food with a new food that contains a different kind of protein. You can also try a food with hydrolyzed protein (hypoallergenic), though this kind of diet can be more expensive. Otherwise, you should ensure Hikaru is not losing weight, having diarrhea, or has a decreased appetite as all of these may indicate a more aggressive disease such inflammatory bowel disease or GI lymphoma. If you note any of these as well, you should have Hikaru evaluated by your veterinarian soon. Best of luck and hope this helps.

It is possible that Pinga is exhibiting signs of stress in her home environment, but there are many things that you can do to help alleviate stress and help her feel better. Start by having Pinga seen by your veterinarian to help rule out medical causes for her behaviour. If no medical issues are noted, you may need to try some adjustments so you can help keep your home a fun and comfortable place for Pinga. Cats need at least one litterbox per cat plus one extra to help reduce stress associated with the litterbox. They should be placed in separate rooms, away from the food and water bowls, must be scooped at least daily (preferably multiple times a day)and washed out at least weekly with a mild soap, followed by thorough rinsing. Cats need a lot of space to explore, but keeping them indoors is much safer than letting them outside, due to the risk of injury from cars, wildlife, other animals, etc. The key is providing space (particularly vertical space for climbing, such as cat trees, ledges, and the like) inside the home. Visit http://www.veterinarypartner.com/Content.plx?P=T&C=33&S=2 , healthcareforpets.com and https://indoorpet.osu.edu// for tips on stress reduction. Also look into Feliway, a synthetic pheromone that is available in a diffuser and spray form that promotes calm feelings in cats http://www.feliway.com , and Feliway Friends, a pheromone that helps cats get along with each other.

I'm sorry that you are dealing with this with Laundry. There are a number of anti-nausea medications that can be helpful for Laundry. And if your veterinarian has not recently checked his blood work (including a thyroid level) and blood pressure, I would certainly recheck those values to make sure that they are normal. Then, you can discuss the best anti-nausea medication with your veterinarian to help Laundry feel better. They will not want to do a teeth cleaning on him if he is not feeling well, so be sure to have them evaluate Laundry and solve this problem first. Good luck! I hope that was helpful. Thanks for using Petco Pet Education Center, formerly Petcoach.

Bring a new cat into the house can be stressful, so yes that could potentially be a cause of Kiri's vomiting. It could also be an illness. I think having her seen by a vet tomorrow is a great idea. I hope this helps.

It's very likely to be the switch up of food. withhold food for 8 hours then offer him boiled boneless chicken and rice every 6 hours in small portions. if he is eating and not vomiting, continue with this diet for 2 days. After 2 days, you can put him back gradually on his old food. If he continues vomiting or is not eating, take him to the vet to get treatment.