Well, i had typed out a long reply, but got some kind of page not found error so im kinda bummed. THanks for the reply Jo, Im one step ahead of you. Using my 10.8v cordless Dremel i cut ventilation holes and a hole for the water bottle in about 5 minutes. I use a few rubber bands on the bottle to stop it from falling through. My concern is that the spring loaded spout might be too difficult for the mice to get water through. Currently 4 of the 6 mice are huddled around the spout attempting to get water. I dont want to kill them cause the waterbottle is too leakproof.

JT