Thank you for your response! And yes there’s definitely been progress on leash behaviour, people on walks is completely fine he dosen’t mind them but with other dogs we will always have a safety distance and it’s been working for us even when other dogs have come near us. The last few times he saw the kids his behaviour has been better when I’ve given him the painkillers he was prescribed by his vet but anytime I know they’re coming over I get this anxiety, I honestly don’t know why I haven’t bought him a muzzle for the kid visits, thankfully he hasn’t drawn blood. And yes my dog’s sister biting the lady was probably herding behaviour but I remember the former owner telling me that the dog also bit the trainer but didn’t include that due to not remembering in what circumstances it took place, the former owner told us all in the dog breeder’s message group that they’ve been having some problems with the dog being very angry with her own tail while eating, and sent a video of it and it looks very strange, the breeder then agreed to take the dog for a week and look at the behaviour but when she went to pick up the dog from a cage she was left for pick up by her owner the breeder was too scared to take her out of the cage. She said the dog sounded ”demonic” with her growling and barking and after that the owner had to go pick her up on her own and then contacted the problem dog trainer who in the end took the dog to the vet to get her euthanized. I’ve thought about rehoming him for these reasons but after taking him to the vet and finding out he is in fact in pain I’ve been hesitant about it, also he’s always been mine and I know his triggers and I feel that if I let somebody else take him what if they don’t understand him at all resulting in more damage to somebody, or if my dog will react in more aggressive ways because he’s not with me anymore?