I'm new and apologize if wrong place to post. It has always bothered me when hunting and fellow hunters throw away the hide, so I decided to make a use out of them. I am just starting and trying various tanning methods (ready made tanning formula, bark tanning, brain tanning, etc to determine the best process. Currently I have tanned 2 hides with Deer Hunters Tanning formula. I followed the instructions and both hides have had hair slip. I mean clumps just fall off taking the top dermis layer. if I was trying to do hair off, this would be perfect but I wanted hair on. The first hide had a large area down the back and across the hips so I thought maybe it was wear I had hung it to drain on a saw horse. So I'm going to figure out a way to use the portions with hair on and hair off the first hide. The second hide was going great and I was in the process of the final stretching to soften as it dried after tanning and there are two small 50 cent piece sized areas where the hair is falling off as I stretch. The pieces would be perfect for a fly fishing lure. I have gone over everything I did and the only thing I can figure out is when I put the tanning solution on the 2nd hide, I did it in my work shop and didn't think about the temperature being 47 degrees since I wasn't cold. I had finished applying the tanning formula and folded the hide flesh to flesh to process. That was when I realized it was that cool and brought into the house to finish the processing time. Could it be because the temp was below 70 degrees? Both hides were deer we harvested, we immediately hung, skinned, gutted, and quartered the deer and put one hide in a walk-in freezer and the other in an ice chest (not a lot of amenities at that hunt) then into a freezer 2 days later. Hides were cleaned of meet, fat and salted, salt bath, washed with dish washing detergent to remove salt and grease, rinsed, drained and tanned with the tanning formula - all according to the directions. Any suggestions on why the hair is slipping/falling in little clumps. I can send pics. Thank you for any help. I've searched everywhere and haven't seen this particular problem before.