I agree with the post above. I would recommend weighing your BP once a month. As long as he hasn't lost a LOT of weight it should be fine. I moved from Tacoma, WA to Biloxi, MS in November of 2011. I had a female Mojave that didn't eat until August of 2012. She only lost 70 grams. I also have a normal male BP that stops eating EVERY December and starts again around March. He's done it two years in a row.