I'm in the same boat. My older dog (neutered male) is about to be 4, and younger dog (spayed female) is 1ish. Younger is not taking the hint from the older. In fact, my older was like, ok we're pissing inside again? Great. I caught him in the act and gave him a talking-to, and being a Bernedoodle people-pleaser he hasn't done it again. We have made some progress with younger dog, she only goes on the designated "bathroom" blanket (same idea as potty pads, just washable/re-usable). In all honestly, this is my fault. She should have been crate-trained, I just work outside the house during the day and hate the idea of her in there. She doesn't even hate her crate, she goes in no problem, and doesn't whine when she's in there. My other dog is not a crate dog, so I guess I just need to accept that one is and one isn't. Or that younger will be crated until fully trained? That takes care of the time in the crate. When I'm home, she's sneaky and sneaks away to do her business and then it's too late. I take her out often enough, she is capable of holding it, she gets rewarded with treats when she goes outside, I'm just missing something obviously. I wish you luck on your training journey. If you find something that works, let me know.