I agree so far, first let me say this...lights on or off? doesnt matter at all. sleeping in the garage? that is a huge deal. is there anything besides the dogs stuff in that garage? are there any tools she could knock over and hurt herself on? is there a lawn mower? she could get a toy under there and slice her toe or nose on a blade. do cars EVER get parked in the garage? I dont care how much you paid for the cars or how often you have them tuned up, every car, truck, tractor, airplane, motorbike, lawn mower etc leaks oil, antifreeze and other fluids. is the garage climate controlled? if not then how hot does it get in there in the summer? how cold in the winter? how much time does she spend in the garage alone each day and night? just 8 hours or so like many dogs who live in the house or is it 8 hours a day and then another 8 hours each night? why did you get a dog if it cant be in the house? she has lots of toys and now she doesnt chew things? lots of dogs who live their entire lives in a back yard have lots of toys too, quite a few of them even have a couple other dogs to play with but they are still extremely bored. wether YOU think of a dog as a 2-3 year old child or not isnt a big deal but they DO have the mental capacity of a 2 year old and need a lot of mental stimulation, love, comfort, companionship from their owner, training and socialization. living in a garage and being able to run around a 5,000 square foot peice of property means absolutely nothing. she is not getting excercise on that property if she is roaming it alone, she needs you. if you cant provide for her in EVERY way, not just vet care, food and toys then you should do the right thing and find her a better home.