I think I've realised where Alfie's problem stems from. On my previous thread (here) we discussed how Paul growls at Alfie and can be heavy-handed when taking things from him, but I don't think that's the main problem but it has probably exacerbated it. I don't know why I didn't mention this before - very stupid of me - but my daughter has a six month old Border Terrier that comes here most evenings and has his dinner with Alfie. Bruno is a bit of a bully boy. He used to totally ignore all of Alfie's warning signs when trying to steal his food or toys from him (because of his age, most probably. He started coming here from 8 weeks) and Alf has had to guard them from him. His food, especially, but also the toy he's playing with because Bruno will inevitably want THAT ONE. I think having to guard his food and toys (food especially) from Bruno has taught him to be on guard around everybody who might want to take things from him. After all, he never gets his food back from Bruno so why should he think he's going to get it back from anybody else, especially as sometimes he doesn't (when he's stolen something). Alfie's only 16 months so was still a baby himself when Bruno arrived on the scene. Also, it was just a few weeks after his arrival that I had to go into hospital for six weeks, leaving him with a friend who isn't experienced with dogs but who also had a 10 week old puppy at the time. I don't think her pup stole Alfie's food but Bruno was still around (she was living in my house for the duration of the hospital stay) and she certainly had her work cut out, looking after Alfie, who was 10 months, and two very young pups. I'm sure it was all too much for Alf to take in - losing his human mum, having my friend around instead and the two puppies leaping all over him and one of them stealing his food. Maybe if he'd been an older, more experienced dog, he'd have been able to put Bruno in his place but he was still very young himself. I'm sure this is the prime cause of the resource guarding and feel such a fool for not realising the root of it before. It was only last night, when Alf was calm and allowed me to take a really meaty bone from him that I started to think more along the lines of "why is he calmer now than usual?". Answer: because Bruno wasn't here! I realise now that I'm going to have to feed them separately, either in separate rooms or feed Alf before Bruno gets here. I'll work out which is more practical and feel my way forward with that. But should I stop Bruno from taking Alf's toys from him, too? Obviously he's free to play with any of the other toys here, but the one that Alf has at the time? I know that in doggy world, possession is nine tenths of the law and that Bruno is trying to exert dominance by taking the toy Alfie has, so I'm not entirely sure whether I should intervene or not. Bruno does this almost every time Alf has settled down with a toy. Bruno can be chewing on the deer antler (his favourite) but still he'll drop that to take away whatever Alf has. Alf and Bruno are good friends when they're out together. They stick together like glue then, so the relationship between them isn't all bad, but they do get into scraps when Bruno approaches to take something from Alf. No bloody has been drawn, though. We'll continue working on the bond between Paul and Alf as that definitely has been a problem, too, although it may not have been if Bruno hadn't been stealing Alf's food in the first place. There's no doubt that Paul's growling noises have been interpreted as a threat by Alf. As for why he bites my daughter more often than he bites me, what might be the reason behind that? I'm thinking either A) because she brings Bruno here so he associates her with him, or B) that he doesn't live with her so doesn't have the same degree of respect for her. Before she got Bruno, she used to train with Alfie, take him out for runs, etc but that mostly stopped when Bruno arrived. She's very patient with him, though. We've been bitten at least a dozen times between the three of us (my friend has never been bitten because she never tries to take anything from him), and still she loves him, as does Paul. With this new information (and I'm sorry for not mentioning Bruno in my previous thread), any ideas that you have would be warmly welcomed. Good mates when Bruno's not stealing stuff.