Cooper our 18 week old DDB puppy seems to have gone back a few steps the last couple of days. In the house he will sit, lay down, come and stay on command, when i walk him i always ask him to sit at kerbs and he normally does although sometimes not the 1st ask. Yesterday i was stood at the end of the road for about 10 mins waiting for him to sit and he has done this every request the last 2 days. I say "sit" and point down, he ignores, i show him the treat ( i upgraded to cheese as he loves it and thought the normal treats may be too low value but its not helped) he just stands there. I refuse to walk on, I'm aware forcing him to sit doesn't work and i know your not supposed to keep repeating, so what should I do??? I look an idiot stood there, saying sit increasingly louder, and he just stands there, yet once inside he does it instantly?? If i can't walk on and not bother to get him to sit, can't keep repeating sit, can't force him to sit, Can't manipulate him to sit with the treat, what can i do ?