A rat skeleton! Like the frog this was also a dissection animal and was cleaned using the drano method. I think this is about the smallest you can go with that method (playing cards for comparison) because the bones were just too thin and damaged to be left in the drano any longer, despite there still being some tissue left. He has his flaws but I'm still happy with how he came out, I don't think I could have done something like this by hand and being a dissection animal he would not have been able to be cleaned via maceration or beetles.
Here you can see the damage done to the skull (notice now flakey it is) as well as some of the residual tissue in the picture below












