I use this exact setup but with 3 hides and I have never had a feeding problem with my guy. The first time I tried to feed him he did not take it right away so I left him with it for a few hours. When he still hasn't eaten it I put it in a bag and dunked it in hot water ( from the tap probably no more than 110)...took it out offered it again immediately and Bam he took it no problem. I do however thaw in cold water first then either dunk in hot for a couple minutes or use the blow dryer trick to eat the face of the rat up to about 100 degrees.
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