Male Rabbit Suddenly Agressive: Help! :)

Question
Hi, my name's Rebecca, I'm the proud owner of 3 guinea pigs, 1 cockatiel, & 2 bunnies. My question concerns my male dwarf rabbit, Mabon, who is now 1 year and 4 months old.

Mabon was a baby when I acquired him last year, he was loving and gentle, and easily litter trained. Also, I did acquire a "ripened" (around 3 years) large New Zealand rabbit named Ostara in April this year. Mabon, for the first time, was very agressive. Soon, though, he got over it, to the point where when he's out playing, he rubs his chin on Ostara's cage. (I think in the beginning, he was just jealous)
   Mabon in the last month, has become extremely agressive. He is more recluse-like, very seldom wanting to come out of his cage to play. He's growling, and lunging, and slapping his paws on me when I reach out to touch him.
 This is new behavior. Could it still be related to hormones although he became sexually mature last year? Or, is it somehow related to my guinea pig Sakura going into heat right now (pheromones)? Or is it that he's just plain grumpy?
  I want to do whatever I can to make him loving and gentle again. He will barely even give us "bunny love" now (when he rubs his chin on our hands and feet). If neutering is the best option, I'm fully prepared to go that route because it's not fair for him to be this unhappy/moody if i can do something to fix it. I never did it before because he never showed any signs of agression.
 By the way, I plan on getting Ostara neutered, too since he wasn't when i acquired him fully grown. I think it will calm him down somewhat. He's not aggressive, just too sexually eager toward Mabon (they stay separated now).(Note: Ostara has never shown any  sexual interest in my female guinea pigs, just my one male guinea pig and Mabon). I think it would lessen his stress if he didn't keep finding himself aroused by the other males.
Sorry if that was confusing. Please give me any help you can.

-Rebecca

Answer
Hi
 To me then yes i would consider neutering to be the best option. It may well be his hormones. Even if rabbits have had something done to help with there hormones they can still feel very aggressive. Also when u have had the neutering done, then you will need totry and give him loads of love. Rabbits can feel very left out. All they need is loving care.

I hope i have been able to help.
GOOD LUCK

                from amie