I've heard about the PH in human things not being right but I've never found it a problem with conditioner. I don't use human shampoo often on the yorkies, though I do on my Skyes, who need muddy feet washing most days up here!
If you want a good dog conditioner, there's one I've used in the past, bit awkward for me to get now. Can't remember the exact name, but I bought it from one of those big pet stores, Pets At Home I think. It was in a tall bottle, flattish, like squashed back to front, & it said on the front it was for long silky coats. It was like a pearlised pale pink, creamy liquid. There was a complete range of shampoos & conditioners in the same bottles. Sorry, not much help eh? But it did work well, it's just I don't get down to big shopping places much.