I have 4 great pyreneese. 2 male, 2 female. My youngest male 3yrs old has a jealously problem, as in with the other dogs getting any attention. The problem is while 95% of the time he is very happy and loving, he can snap in a single second. My husband has been stitched twice for bites. When we got him at 7 weeks he had a food aggression that we were able to take care of by hand feeding and eventually letting all the dogs free feed. The problem now is that he has for the first time attacked for no apperent reason. We do not know how to handle the problem. Any advise would be appreciated.