My brother's dog Lucy is a lab/greyhound/? mix (at least that's what we think). She is not quite a year old yet. The other weekend when Zoee was there they noticed pee spots on the floor and weren't sure who did it, Lucy or Zoee. Well, after Zoee left they discovered Lucy was going potty while she was asleep.
Has anyone ever experienced this? And is there a way to help stop it?

They just found her at the end of January, so she's been to the vet regularly to be checked and get caught up on all her shots. There isn't blood in it, and it's only when she is sleeping that it happens.

Thanks!