Well, I have had an unfortunate set of circumstances that have turned my Halfinger mare Sweet P into a bobtailed draft pony.
On March 30th I sent her down to a mule breeder's to get her bred. Before shipping her, I wrapped her tail with the cotton wrap stuff and Vet Wrap to keep the manure and ick off of the thick tail hair and her privates. I made sure I could slip 3 fingers under the wrap.
So all is well at the breeders, she does not come into heat for the 1st week, or the next.... and finally she hit her cycle last Friday (April 9). When the breeder started covering her with the jack donkey she noticed a bad smell and that the top of Sweet P's tail was hot. She unwrapped it and a bunch of blood and pus blew out. Now, the mare did not act the least bit painful or concerned over this. The breeder cleaned out the nasty stuff and called me right away. What we think happened was that the cotton part slipped down, and the Vet Wrap slipped up higher on the tail with my mare backing into and rubbing against the fence (teaser stud pony next to her turnout pen), and basically the Vet Wrap turned into a tourniquet.
The breeder started her on a broad-spectrum antibiotic right away, and the next morning the tail came off. She was going to have her vet come out and amputate it, but Nature took care of that on her own, and now there is nothing we can do but keep the stump clean and run the course of the antibiotics.
It is pretty shocking, I haven't even seen my mare yet, she is still in heat and I have arranged to have her shipped home Thursday. As terrible as it all seems, Sweet P has not been in pain and she will probably heal quickly - and will look like a miniature Belgian with a docked tail.
I just feel really bad about putting the Vet Wrap on her tail in the first place, and a little upset that it was left on for so long without being monitored, but there is really nothing to do but go on from here.