My cat keeps hissing at other cats. Does he need a single-cat home?

It may take time for Lilly to accept your other cat even though she is the smaller new cat. Some cats just don't do well together so if this behavior continues or gets worse I would recommend either talking to a veterinary behaviorist (if there is one in your area) or considering finding someone who can provide Lilly a great life as an only cat. Thank you for using Petco Pet Education Center, formerly Petcoach.

Unfortunately it's going to take time. That said, there are a few things you can make sure of to help reduce stress, especially in a four-cat household (which is a lot!). Making sure each cat has their own space where they can eat, drink, play, observe, etc without the other cats bothering them can help reduce territorial disputes over these items. Pheromone collars and plug-ins (Feliway) can also be placed on stressed out individuals, or in shared rooms (since everyone seems to be stressed) to help reduce inter-cat aggression. Making sure to have at least one litter box per cat will also help reduce stress and competition over them, and reduce the chances of accidents elsewhere. Otherwise, continued slow introduction of the cats is best. If anyone starts to get agitated or too excited, removing them to let everyone calm down and settle back in is best. Continued aggression and upset may also need a trainer or veterinary behaviorist's help. That said, if your home is very small, four cats may just be too much for everyone to get comfortable.

If i'm your cat i would probably say to you "don't you dare!" it really depends what is the reason for adding another cat to the family, if this is to keep your other cat's company then i would probably not do it.

Introducing a new cat to the house is like getting a roommate you didn't choose, it isn't always a great fit! Make sure that Weasley has a safe space to escape with his own litter box and food and water. Make sure he gets plenty of one on one attention. Once he feels he is safe again, you can slowly reintroduce him to the other cats. If you have a very tall baby gate or screen door, you can keep the cats separated that way, but they can still interact. It can take several years for cat's to get along, and some never really do!

Congrats on your new cat! Yes, I do think that he has the possibility to be happy around the dogs but it will take time. Moving into a new home is stressful for a cat, and getting used to the current occupants is also stressful especially if he hasn't been around dogs before. It's normal behavior to arch and hiss when the dogs come near to Simba, and as long as he isn't reacting aggressively (trying to hit or bite them), then do not discourage this behavior. He is letting them know his boundaries and what he is comfortable with in regards to them. Give him time to adjust and his relationship with the dogs should improve over time :-)

If he seems like a friendly cat than there is a good chance he will get along with another cat. It may take some time for him to adjust but usually cats learn to get along. You could try some Feliway spray or diffuser and see if that helps. Taking the introduction slow is usually best. You can start by separating them in rooms that share a common door and feeding them by the door for a few days. Then switch the rooms that they are in so they can get used to each others smell. After that, you can put them in the same room with supervision and see how they do.

Some cats do like company and others do just fine as the only cat. They are all different just like humans. When you move, make sure Tim gets lots of attention and play time. Provide him with climbing opportunities like a tall cat tree or shelves. There will be an adjustment period that may last a few weeks as Tim gets use to his new living situation. If he seems lonely beyond this, then maybe look at getting him another playmate. It’s ok to see how he adjusts and many of them do just fine. I hope this is helpful and please feel free to post any additional questions.