The previous owner used live rats. I'd love to go the frozen route as hearing the rodent scream in terror isn't really my thing.
Not sure how to lower the humidity unless I drill some holes in the top of the enclosure. That could work. Also, I'll pick up an actual thermostat for the heat tape rather than relying on the dimmer control and a thermometer. Thanks for the suggestions!
I'll have to check out the FAQ for photo sharing. I've got a picture of him on my profile page.