I have 2 males approx same age, I’m gonna guess at 10 months old, I had them both fixed in May 2015, they were really aggressive pre-neuter so I separated them them then got they’re shots and then fixed. After getting them fixed, I’ve kept them apart, they have separate cages, but they can still see and smell each other, I waited a month or so before trying to put them together but the first time was unsuccessful, they instantly starting fighting. So now that it’s warm out, I made a pen outside approx 4′ x 4′. Put them in the pen together and I was amazed they grooming each other,, sitting together, playing, I was so excited I thought I had been successful Nope, brought them back in the house pit them in one cage, and they went at each other, so again they went back to they’re own houses, so I tried again, again it was successful, I’ve had them in their outside pen 4 different days and it was awesome, but not inside, them yesterday, my hubby bought this pen that worked out to be 10′ x 10′ put them together, they were running and doing binkys, I was so excited and then that lasted about 15 mins, then the fighting started again. I want to know what I’m doing wrong, I don’t like the little cage cuz they don’t seem to play or do anything, even when they’re in the house for “play time” I have to separate the room in half.. Any advice would be great, cuz I really want them to be friends again, but I think I waited to long to get them fixed