When should I worry about aggression towards the other bunnies? Everyone has their own cage and are apart 90% of the time, however, as much as possible I let them run around the yard. The boys were starting to show interest in the girls so now they go out in 2 shifts (2 boys, then the 3 girls), but when should I start to be especially cautious about them showing aggression towards each other? The yard they run around in is large (almost 5,000 sqft) so it's not like they are in a small space together but I noticed today that the boys both hang out in the same general area. They are always supervised but I just wanted to be prepared for when I should expect it. I was assuming breeding age but not sure.