we have just taken on a rescue rotti he is roughly 18 months old neutered, he is quite big (over weight) dopy and acts the right clown, he does some basic commands like sit and down but his stay and recall is a bit hit and miss and we are working on that I know they can be slightly stubborn when they want, we did do a lot of research on the breed before we agreed to take him on I just need a few tips on training him to walk without pulling my arm out of it socket, what commands are the best to use, I have been saying "wait" and when he does I give him a treat but as soon as he has eaten it off he goes again pulling, he has just a normal collar and lead, should I be using something else? at the moment he is only on a 15 min walk twice a day as previous owners kept him outside in a shed never walked so he has very little muscle tone in his legs but jut that 15 mins my arms are killing me, don't want it getting worse once he is toned...we live in the country and the nearest dog obedience class is a 50 mile round trip so not able to take him there, thank you in advance please be nice :)