I am interested to know peoples thoughts and experiences on this topic. My colt is rising 3 and is predominantly kept on his own but there are plenty of horses around for him to hear/see/talk to etc. My GF whose Arab stud he is kept on has a much older resident Stallion who will happily kill any other rival for the ladies attention, however she has 3 new colts on the way, one already here another 2 yet to arrive. On the weekend we put her new young bloke in with mine and the two of them mostly did typical colt head and neck wrestling, rearing, biting, pawing, and lots of racing each other around, then after about 30 mins, settled to eat on the same hay roll. My GF is very reluctant to keep the boys together yet I am all for it, I have found it far healthier to run the colts and young Stallions together, and even the older Stallions in the off season provided they get on fine together. So Stud owners and Stockies, what are your thoughts etc?