Hi, I am new to this site as it probably shows but hopefully i will get this right. I have a 3 year old male Samoyed which although is a lovely friendly dog and a great family pet he is very strong.He is the third samoyed we have owned but the only one that when walking constantly pulls, can anyone help or suggest a collar that may help.We have tried several collars but not with much success, looking forward to hearing from anyone that maybe can give me any advice.