Sudden Aggressive Behaviour
i really need your help here. My baby Bes has had a pretty tough beginning of life. He was diagnosed with severe dysplasia when he was 6 months old (we got him at 5 months)...mainly due to bad breeding....by the age of 9 months he was in atrocious pain and we brought him to Italy (we live in Dubai where the surgery is not available) to get both hips replaced. My sister looked after him for 4 months an then he was sent back to us in October.
In the meantime i was ran over by a cab driver and by the time Bes was back i was just myself working on getting myself back on my feet...so we both worked on our recovery together. Bes has NEVER shown any aggressive behavior till now, but all of a sudden he has become highly intolerant towards other people to the point of being aggressive with anyone who will come near me. This happens not only with strangers (in fact less with strangers than with familiar faces) This happens only when im in the house.
Ive put bes into obedience training since he was very small and he is very good with me. Of course he is been out of the game for quite a while due to his slow hip recovery. He listens to me (recall, sit etc). He always eat after me, always enters a door after me, is not allowed on furniture etc.... but if the maid (who btw walks him every morning) or my nephew/his girlfriend who are temporarily living with me even try to come near me, he starts barking like crazy, put his back hair up and recently has literally starting going for them i.e jumping to bite....if during the night they come back home late or wake up very early in the morning....the same happens....im very concerned about this sudden behaviors and i am not quite sure how to correct it? any advice would be appreciated and especially any suggestions on why he is suddenly behaving this way...the alpha role seems to be pretty well established (with me being the boss) ...so?