pees in crate & lays in it

Question
I have an 8 month old Great Dane and she is peeing in her crate and laying in it. She won't make a sound to let us know she needs out, and she has no medical problems. She is otherwise potty trained. She doesn't pee anywhere else but in her crate and mainly at night. We have limited her water intake in the evening. She goes out regularly. Please help. Thanks!!

Answer
That isn't normal.  You might get a second opinion from another vet.  When she makes her last trip out at bedtime, make sure she walks around to stimulation elimination.  If that doesn't work, try getting up in the middle of the night and taking her out.  You shouldn't need to at 8 months, but you have already done much of what should work.