Why is my sweet cat aggressive after being lost for a month?

Since she was gone for so long, an examine with your veterinarian would be recommended. This may diagnose any underlying injury or infection. Frequently, either can be responsible for a sudden change in behavior. In the meantime, give her space and time to reacclimate to you. Don't force her to be held or pet. Offer treats and praise when she comes close. A pheromone product, such as Feliway Spray or plug in diffuser, may help to decrease any anxiety.

It's possible he is being skittish, just enjoys being outdoors, or has been injured and so won't approach you. It may be a good idea to contact your local animal shelter for a humane trap (one that doesn't hurt them when they enter it). You can then place it in his usual hangout spot with some smelly food (heated chicken or canned food) to entice him to enter. Once he's safely captured, bringing him to your vet to make sure he's OK after being out so long is best, and from there you can get him settled back in indoors.

Your kitty is not feeling well. I suggest you take her to a veterinarian for a check up and blood tests. She may be ill, and therefore defensive when the other cats come near her. She may also need special food to gain weight properly .

I hate to hear that story about Rusty. The treats wouldn’t make him drugged or cause him to be aggressive unless he was frustrated that he wasn’t getting any treats. As far as if he can be trusted, that is anyone’s guess. He is an individual just like we all are. Plus who knows what experiences he has been through in the past eight months. You have an equal potential that he could be very good or he could also be aggressive. There are behavioral specialist for cats. Some of them are available over the phone for guidance and other ones can come to your house. It’s a decision you will need to make as far as what will you do with Rusty now. Best of luck with this decision. Please feel free to post any additional questions.

I am sorry to hear about Memphis. Sometimes cats will react to a stressful situation by transferring their frustration/aggression to those nearby. I would be sure your kitty has a safe area at home where he feels like he can hide/get away if wanted and he can easily access his food/water/ and litterbox for the next few days. I would consider picking up a Feliway pheremone diffuser such as this one which releases pheremones which can be calming to anxious kitties. I would also consider a calming supplement such as Composure or Zylkene. Your vet may carry these or you can order them online or find them in some petstores https://www.petco.com/shop/en/petcostore/product/vetri-science-composure-feline-bite-sized-chews

That is very unusual and sounds scary! There could be a few reasons for this behavior. Sometimes there could be pain or a medical condition causing a change in behavior. Since Oscar can't talk and tell you what is happening, I recommend to have him examined by the veterinarian to be safe. Sometimes this behavior is related to the stress of seeing another cat outside. For some cats, this causes frustration and they can then exhibit bullying type behavior to other pets or people within the house. If the veterinarian thinks this is behavioral, there are a few things you can do. Try enriching the environment. Here is a great article about cat's instinctual needs: https://www.petcoach.co/article/why-every-cat-needs-a-place-to-climb/ Use a Feliway diffuser, set aside 30 minutes a day for vigorous play (really get him moving) and/or switch the food to Royal Canin Calm. If he is the only cat in the household, you may try feeding him out of a food puzzle. Hide food for him to find. Do not use these last two mentioned options if you have other cats. Provide a stand or resting place by a window so he can look outside. You may also try clicker training him for positive behavior. Here is a link about training cats: https://www.petcoach.co/article/can-i-train-my-cat/ Wash all windows and doorway exteriors where a cat may be spraying outside. Try to drive out the cat if possible. You may also need to block the window where you think Oscar may be viewing the cat most frequently. Most cats response best to combination therapy. The veterinarian can also prescribe medications which can help with aggression/stress. I hope this helps and please feel free to post any additional questions.

Oh dear, how stressful! Unfortunately it can be common for cats to lash out when one cat in the household suddenly smells or acts different - as they tend to do when they come home from the vet. Most of the time they go back to their normal interactions once the strange smell (in this case, from the vet clinic) wears off and the cat relaxes and acts like herself....but in your case, there's nowhere for Tribble to hide and isolate herself while she readjusts to being home. The most important thing right now is to not allow them to fight or have negative interactions. As long as they can be kept separate while they both settle down, they will probably do ok - but if they continue hissing and growing, and worse yet if it escalates into a fight, that could permanently damage their relationship. I would absolutely keep them separate until they seem to be relaxing. I understand that'll be challenging in a 1 BR living space - but if possible, you could put 1 in the bathroom with her own litterbox & food, and then have them switch places tomorrow so they can get reacquainted with each other's smells. If that's not possible, you may need to crate them both while you work on their reintroduction. Perhaps you could borrow dog kennels so they can each have their own living space while they're confined. I know this isn't an easy answer - but the most important immediate intervention is to do what you need to do, to keep them from fighting while the stress levels come down! Finally, adding a pheromone diffuser such as Feliway Multicat may help promote a calming atmosphere. I hope this helps!