Yeah, I'm going to stick with my vet's advice on this. Lu goes to see her enough as it is, I can only imagine bringing her in for kidney failure saying, "Yeah but this internet chick said it was okay!!"
You're lucky your dog is good like that. When we get a house Lu is going to have her own room (without carpet) and we'll keep her locked up in there with potty pads or something. For now, I get to post funny uh oh pictures on the internet
Its just crate training, its a common thing to teach dogs. She will not have kidney failure because her bladder is empty when we put her in the crate.