My pup Max uses concrete to do poo's and some times wee's, we have plenty of grass for him, but unless i take him to the grass he wont use it, even if im standing right there sometimes he will run off grass and go on concrete (more so if grass is wet, but on nice sunny days he will still go on concrete) i have always stood on the grass with him
i have been giving him treats every time he goes on the grass, if i catch him in the act, i pick him up (carefully esp for wee's!) put him on the grass, and give him the command to go toilet (get busy), sometimes he will go again on the grass and if he does i treat him again
buutttt to stop him using the back courtyard for poo's i have put up temp fencing (Poo's are the hardest to encourage him to do on grass!)but he has figured out how to jump down on the courtyard (two level backyard) and he gets suck but now that we have the dog door he can come and go as he pleases! (only just started today using it on his own!), he was very lucky tonight that i got sick of his wineing i went down to close him in crate i thought he was wineing cause i left him downstairs, out of the crate (was going to start letting him have the freedom of using dog door overnight, he is blocked off area in kitchen so i don't care if accidents inside, normally i crate him) but he wasnt inside! so i looked outside and the silly pup is in the court yard again! so i got him out, but now he is locked in his crate, so apart from putting up more fenceing, which i think i have enough chicken wire to do it, what else can i do to encourage him to use the grass to go toilet on?
the other thing is that we have a path from our front door to fence, so he uses that also and there is no way i can fence that off!! unless i give him is own 'run' from dog door onto grass but i rather him have a big area to run and play in outside...
ohhh and when we are at my work (where he comes with me 3 times a week) he always uses the grass (have had a few accidents in other areas), they have a paved area and shelled courtyard, but he never uses (which is great) but i have done the same training in both places?