Cowboy Magic to the rescue!
The two new geldings I got, have only had minimal care at best. Today I tackled the matted tails. Both of them had solid lumps from the end of tail bone down about 8 - 10 inches. It took a little over 2 hours & half a bottle of Cowboy Magic detangler, but I got it done. I really thought I was going to have to cut their tails off at the start of this. Scout's tail now drags the ground & Dakota's goes to his hocks. I wish I had gotten before & after pictures. I can't imagine how uncomfortable & painful that had to have been for them.