Hi all, Looking for some help please. We recently adopted a 5 month old mixed breed from Romania. He arrived on Saturday after a long 4/5 day trip. He was in a kill shelter for the beginning of his short life and then more recently a foster home. Socialised around other dogs, humans and cats. He acted as we suspected when he first arrived. Very timid, exhausted and generally nervous around us all. However, very quickly showed little bursts of his personality and in general has settled very well. He has never shown any fear or aggression towards me. Hubby had a little initially but this quickly disappeared. He is very loving and playful around both me and my husband. Our teenage son is a different story. Our son has been nothing but kind to him but something seems to trigger the poor pup. He growls as soon as he hears him moving around. This intensifies when he enters a room and progresses to barking. We are in the process of trying positive reinforcement - my son will give him treats when he enters a room and we are having him feed the pup as much as possible to try and build up trust. We have also at time given a form "no" to discourage the behaviour. This has made Jo difference, in fact I'd say the behaviour has gotten worse. There are so many differing opinions on best course of action. Just looking for some advice. We are obviously aware there would be some work involved with a rescue puppy, but we want to get it right and our son to have the companion he was so desperate for. Thank you to anyone who has taken the time to read this. It's much appreciated.