yahtzee used to co-sleep with us until we got pg, now she sleeps in her basket in our room (much to her disgust).
shes 4 now and grew out of having to pee during the night at about 2.
she also pees when we say "do a wee" but 1/2 the time its too cold or wet or something 4 her 2 want to go out before bed and in the morning, i swear she has an iron bladder! she can go an entire trip from adelaide to melbourne with 1 toilet stop!
if u have a doggy door, can u leave the door open so they can go in and out of the doggy door during the night if they need?

but look up cesar milan, he has really good advice and ideas that are really easy to follow and good for the pooch