Thanks for your reply tika - Jay (cag) was with his previous owner since baby - an older lady & her husband but apparently her husband didn`t pay Jay much attention & he terminally bonded with the lady. My husband used to visit quite often over a period of roughly five years and used to feed and talk to him without any animosity. As far as possible we did wonder whether he`s become very possessive with me which is why he has principally started to behave in this manner but are not too sure how to arbitrarily deal with it. In some way do you think that every time he `attacks` we should remove him to another room for a while then return him with us and if he repeats the behaviour we remove him again until he asociates the two? On the whole apart from this, he is obviously wary of strangers but does not selectively fly from his cage/expertly stand to bite them. He is normally a very loving bird.