Dog is nearly 2, normally does most of his pee and poo when on walks in morning and evening.
He was neutered at 6 months, doesn't lift his leg when he goes, and doesn't really seem to mark his territory at all, so there are limited opportunities to reinforce him going in the right place/discourage from going in the wrong place, as he seems to go quite infrequently, even when let out into the garden during the day.
Our garden project took a few months, and before the turf was down I'd catch him weeing and pooing on the bark path. So while we were putting turf down, I made a small corner area in the garden for him with bark and a border where I'd like him to go.
Now he doesn't seem interested in going on the bark in either place, instead goes on the turf, and we're getting dead patches of grass with circles of taller grass around. I can't catch him doing it to discourage him, and I'm unsure how I can let him know that corner is for him to go in! I'm sure I've seen products that are meant to help you train your dog to go in a certain area, but are they just for puppies? Would they work on an older dog?
Any ideas how to get him to use his doggie toilet before the turf gets wrecked?