yeah its worrying about his age,i have spoken to 8 different trainers today and they all believe it was not out of aggression,there was a few main reasons they said, one was because he thinks of little kids as pups as well and was either trying to play with him or try to control him, another was that he was scared of my son, we have noticed he is scared of little children and may of felt treatened.
we are going to see a trainer and get him assessed, to see if he is going to be aggressive. i will not own an aggressive dog, one in which could hurt my kids or anyone Else's. so once we know where we stand we will make our choice.
this is not something that will be taken lightly, thank you everyone for all your feed back, its been really helpful. hopefully this will all work out which ever way it goes.
if we cant keep him, I'd like to be able to find Doug a home that understands this and wants him. but i hope it wont come to that,because he is a good dog other than this.
but if anyone does have anymore info on English mastiffs or any other mastiff that has had the same issue please let me know as i want to find out as much as i can.