Bichon/Poodle Mix Aggression

Question
Hi, I have a year-old male Bichon/Poodle mix named Diesel who has been having a problem with aggression lately (the past month or so). He growls a lot more now and he snaps at our female Papillon whenever they play or if she interferes with me playing with Diesel. Within the past week, I've caught him under our bed chewing on objects he shouldn't have been chewing on. Whenever my wife or I tried to get the object away or get him out from under the bed, he's tried to bite us (coming very close). I understand he may have felt threatened but he's never acted in such a fashion in the past. I'm not sure what to do. Any help would be much appreciated. If you need any more information before giving any advice, please let me know. Thank you for your time and I look forward to your response.

Answer
Hello Juan,
Actually, this is a problem that needs to be addressed by a professional (you need a Dog Behaviorist) that can come into your home and work with you and Diesel one-on-one.  He is becoming dominate and knows that by attempting to bite you that he can control the situation.  You need to fix this problem at once so it doesn't escalate into you or your Papillon actually getting bit.  

I would call Dog Trainers/Behaviorists in your area to see if they can help with this problem.  You might also contact Vets in your area to see if they can put you in touch with a Dog Behaviorist.  This issue can't be helped by the both of you without a professional that can be there to assist you.  

I am sorry that I can't be of more help, but without help this problem could become much worse, and I want to be sure that you get the proper help with this situation.

I can suggest that if Diesel isn't neutered, this is a recommended action that will help his aggression.  

I hope that this helps you some.  If you have other questions concerning this or other questions in general, please feel free to ask.  
Thanks for using AllExperts.com,
Kim