Odd Behavior

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exton

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Hi,
I've got a two year old male guinea pig (Wally) and a one year old male (Archie). Wally's initial companion died suddenly last summer when Wally was about 11 months, so we bought him a new friend and introduced them slowly over a month or so. They have been living together contently for the past 10 months. However, recently I noticed that Wally had a bite taken out of his ear while they were out in their run, and a couple of days later I noticed Archie had also received a bite on the ear. I've also noticed that Archie is exhibiting strange behavior. He is climbing on top of Wally, but not in a sexual manner. He is approaching him from the side and kind of just sitting there until Wally complains and throws him off a couple of seconds later, and is fairly regular (every few minutes). They are bickering much more than usual, and have started flinging their food bowl about. This morning I noticed Wally had a couple more teeth shaped cuts on his ears, and has a couple of patches of fur missing on his back (although this happened a wee while ago) In his old pairing, Wally was very much the dominant one, and has been with Archie as well, up until now. Is this Archie challenging his dominance? What is the best course of action?
Thanks for your help.
 
It is more unusual for adult boars to fall out that late in the teenage hormones, but it can happen. If you are unsure whether a relationship is still working, you can stage a short day long or overnight separation. If one of the boars is suddenly perking up when alone, then it is a sign that he hasn't been happy. If they want to be together, then you also have your answer. Please stage a formal introduction when putting them back together and make sure that their cage/hutch plus contents is all cleaned.
http://www.theguineapigforum.co.uk/threads/faq-introducing-and-reintroducing-guinea-pigs.38562/

PS: Have you had Wally checked by your vet for mites or fungal re. fur loss on the back and are you weighing your boys weekly? This is usually not connected to dominance issues. An underlying health problem could have triggered the change in behaviour/dominance.
http://gorgeousguineas.com/photogallery.html
http://www.guinealynx.info/mites.html
http://www.guinealynx.info/fungus.html
 
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