If you "kept" Lhotse's corner by putting gravel in his area, then I think the solution is just that Lhotse prefers to "go" on grass rather than gravel. In fact, one of the best ways to prevent a dog from going in a certain area is to put pebbles or gravel in the area because dogs are naturally inclined to urinate on soft surfaces (that's why dogs, if given the choice, will urinate on rugs rather than laminate floors). Soft ground holds scent better and it soaks up the urine.
Dogs really do live in the moment. If you rebuke him for defecating on the grass, that sends a point across. But if you praise him by moving the poop onto the gravel, that doesn't send any point. His mind is probably going, "So you put poop on the rocks...What did I do to garner this praise?" I'll be honest, it'd probably take an incredibly smart dog to put two and two together and start pooping on the gravel if you train like that. I think your timing of praise and punishment is a little off. If you catch Lhotse pooping in the grass, say "AH!" and pull him over to his corner. Let him finish pooping, and then praise.
Also, I'd get rid of the gravel and keep it plain dirt.![]()
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