We adopted a kitten back in December and he's roughly 6 months old now. His integration into our multiple male cat household went very smoothly and I couldn't imagine a better fit. He is respectful of our elderly cats and has become a perfect playmate for our two younger males(both about 2.5 years old). All of our cats, including the kitten, are neutered but the two younger cats were neutered late by their previous owners(both at 1 year of age) and at least one of them has mated(
). The kitten is very submissive, gentle, and calm. He shows no signs of wanting to climb the ranks here, so to speak.
Here's the problem: A few weeks ago one of my 2.5 year old boys started to mount the kitten. He's a submissive, anxious cat(he's the same size as the kitten & has a neurological condition - in short) and he absolutely adores other cats. He's a big reason why we adopted the kitten and, when they met, it was love at first sight for both of them(not a single hiss between them). The mounting behavior has increased to the point where it dominates their interactions which used to be more play and cuddle orientated. Not long after he started mounting my other 2.5 year old began to do the same and it too has increased and replaced much of their play time.
The two 2.5 year olds do not interact with each other for reasons that would take another post to explain
The smaller kitty is afraid of the bigger kitty, in short, and they avoid each other but enjoy the company of my other cats. We've wondered if perhaps they're trying to compete with each other by fighting for dominance over the kitten as they both adore him, see each other playing with him, and smell their respective scents on him. Our other theory is that they're aware of the age he's reached and fear he will make a "power grab" so they want to keep him in a submissive position in the household. We've also wondered if it has anything to do with the fact that we live next door to a (registered) breeder who may or may not have females in heat at this time.
None of my cats(all indoor-only) spray or behave in other territorial ways; it's a pretty calm home and they all get plenty of attention and have many toys, cat trees, beds, shelves, and other places to enjoy. The dominance mounting does not, btw, appear to hurt the kitten and he doesn't put up much of a fight but will squirm away after awhile.