lol welcome to my world. I gave up throwing away rats about 4 months ago to go to live, but the place I could get them for cheap no longer had the size I needed. Of course, I have plenty f/t in the right size... the only other place I can get rats runs me about $6/rat and with 4 eating exclusively live... that was adding up. I'm about to 'tough-love' them. They're all a good weight, they're just going to have to deal with me no longer offering live to them.

Make sure the head of the rat is plenty warm. I've had luck also bumping the rat along the substrate to make noise like it's running around. You may just have to be patient and wait them out.