We have a rottie he is 3 years old never been aggressive in his life we have been on holiday before and Bruno has stayed with family,this time however he stayed with a different family member that he does know well but since we have been back he has become all possesive with his jumbones is this a natural reaction from staying somewhere different?

This is just a guess but it may be that the people he stayed with he possibly became the 'pack leader' whilst you were away and now you are back he is just trying it on?

I did think of that and for the time being we have confiscated the bones.Thanks for the reply though.