Hi Everyone, I've been peeking in on this forum for some time for the how-tos and stuff, and I would finally like to ask a question. I'm a complete beginner, and so far my mounting experience consists of several mice, two squirrels and a duck. I use a pet shop for buying feeder mice and rats because I don't have a huge setup, I'm working in a small room in my house, and rodents are perfect for practicing on... what does it matter if I make a few mistakes on them but at the same time learn? I bought a pack of 10 mice and everyone turned out fine. The rats however came in a pack of 4, and every since one of them slipped. I'm talking hair and dermis coming out in huge chunks. The first 3 I used just borax. I got to various stages between sewing up and two or three days after mounting before all the hair began to sip. But the fourth one I went to the expense of buying para-tan, tanning oil number 2, and a big bag of baking soda for the nuetralisation. I followed the para-tan instructions, making up one 10th of the batch size as I didn't have 5lb of drained skin (I didn't want to waste a whole bucket of solution on one rat!). I added the right amount of salt to the solution, also reduced down to a one-tenth amount. I basified properly cheking PH and all was good (I'm a stickler for instructions!). I have a sneaky suspicion it's one of two (or both things): 1) becase the rats are pet feeder food they've been defrosted and re-frozen a dozen times between the source and my work room. I read that repeated defrosting and feeezing before removing a pelt from any animal can cause baterial growth between freezeings and the hair to slip. Or 2) when drying the rats after washing with my hair dryer the heat is damaging the pelt. I don't have a cold function on it, but the coolest setting doesn't really feel warm. Can anyone think of any reason why the 10 mice from the same freezer turned out fine, but the whole 4 pack slipped? Thanks and nice to meet you all!