Location: Dogsey and Worcestershire
Joined: May 2004
how long has this been happening, is it a new thing. is she spayed or due a second season.
Do you make sure she is 'empty' when you go to bed, rather than letting her go out alone you really need to go with her to make sure she goes.
I would not
be tempted to restrict her access to water in any way , doing so tends to concentrate the urine and this can aggravate the bladder making a dog want to go out more not less .
If all is well medically and it is a habit she has got into,I would do as Ben Mcfuzzylugs suggests and have her with me for a while in a small crate/box next to the bed and take her out when she asks to go out , no fuss or playing in and out .
If you do this for a few days make a note of the time she asks to go out and see if she has started going at a regular time. Assuming she normally sleeps in the kitchen you can then try returning her to the kitchen and set your alarm clock for the time she normally goes and take her out. Next add a few minuets every few nights to the time you go to take her out and you should with patience be able to break the habit and train her to go through the night
Can I also ask what you feed and when, does she seem to drink a lot . If she is fed on a complete food and fed quite late she may be drinking large amounts to hydrate the food so altering her last meal time to a little earlier in the day may help.