I have a pair of boars and one on his own as his companion died, the pair are about 2 and half years and the lone boar 7 months. They have always lived next to each other but in seperate hutches. Today I began integrating them to see if they could go together. I put them together in the playpen on the grass. there was lots of rumblestrutting and bum sniffing, jumping and running around, I was led to believe they would fight within the first 10 minutes if they were going to? However after being together for about 15 minutes the smaller boar of the pair made himself all round and started rocking from foot to foot and rumbling, he didnt charge but this is a sign of aggression right? In turn the others raised their fur but no rocking. They stayed in the run for about 20 minutes they didnt fight but I think this is beacuse there was enough space to run. So my question is, is it worth continuing each day do you think putting them in the pen together to get used to each other over time, does their behaviour mean putting them in the hutch together would be too risky and I should just give them playtime together each day?