Why is my intact male rabbit mounting my cat? Will neutering help?

I have never heard of one cat killing another over mating issues, so you shouldn't need to worry about this :) However, I'm sure it is annoying for your female cat to have him constantly trying to mount her, and this can certainly lead to developing aggression issues between the cats over time. I would try to get your male kitty neutered as soon as possible, to help prevent this from continuing to happen. In the meantime, if he won't leave her alone, you may need to keep them separated until after he is neutered.

You are correct that it is likely dominance behavior, but it could also be sexual in nature which is why his penis is becoming unsheathed. Neutering him will help with this behavior, so I would recommend having him neutered as soon as possible.

It may be marking behavior considering he is intact. It could also be stress/excitement or simply being held too long and he has to relieve himself. Consider having him examined by your veterinarian or a vet experienced in treating rabbits to rule out medical causes. You can discuss neutering during the appointment. In the meantime, when holding him, place a towel on your lap and make sure he has ample opportunity to use the litterbox. Watch for a raised or twitching tail which usually indicates he is about to urinate or defecate.

It does usually take a few months for all the hormones to dissipate post neutering, however if the cat was neutered at a much older age, he may still have some of the behaviors/interest even without the ability. Keeping the cats separated if this behavior occurs, or even adding in a pheromone diffuser (such as Feliway) may help with inter-cat interactions.

Neutering may help this behavior. It can also decrease other male cat behavior such as urine spraying or marking. And if Simba is an indoor cat, urine of a neutered male cat does not smell nearly as strong as an intact male. In general neutered male cats tend to live longer healthier lives bc of less disease and injuries fighting.

Hi there and thanks for using Petco Pet Education Center, formerly Petcoach! Usually aggression in our pets can be altered a bit by removing excess testosterone with neutering. While it is not impossible he is lonely-likely he is frustrated with the removal of his mates each time. Neutering may help with his need for female attention as well as curbing unwanted aggression due to excess testosterone. I hope this helps!

Mounting behavior is not unusual but I would recommend to have both rabbits checked out to be sure they are both males! You definitely don't want a bunch of baby rabbits! Male rabbits can sometimes become aggressive so neutering them is a good option to decrease aggression. You can discuss the surgery with the doctor during the visit to see if this is a good option for you.