My 'bonded' buns have just had a major fight. They are both neutered males, Alvin is around 2 years and Buddy 1 year, they bonded easily about 6 weeks ago and were happy sharing food etc but I have come home tonight to find fur in the back garden. I could see that they were being grumpy with each other so brought them into the utility room without litter trays etc and they had a massive fight. Alvin started it (buddy is the dominant one) but then Buddy just wouldnt give up, I have put Buddy back in their playhouse for tonight and Alvin is now indoors. Help please, what should I do?