Millie lost her tail

A week ago I got home from work and noticed that Millie was not feeling very well, I tried to take a look at her but she would have nothing to do with me, and ran and hid in her kennel. So I thought that she might just have had an upsetting day and left her alone.
She soon appeared to come right, and on Friday when I went to let her and Mabel out of the kennel for the day, I noticed that she was not wagging her tail, and then on looking realised that she did not have a tail to wag anymore, it was gone, I searched high and low for the tail but could not find it anywhere, not undr her blankets, or in their run, how on earth could she have lost her tail I really dont know, I thought of blaming Luke the little terror dog, but my land lord who is a farmer, says that the dog did not do it, he suspects it was Mabel, in a fit of anger against her sister, she bit off her tail. Poor Millie, well she will just have to get used to it, I eventually found it lying in the grass in the garden, maybe I could stick it back on?
Yesterday I went out to call the pigs for supper and could not find Mille anywhere, I called and called, but she did not come, so I went to check her kennel to see if she was there, oh yes there she was, making her bed, she had taken all the old food bags I had on the veranda up to her kennel and had laid them out over her duvet, all nice and warm and comfy. How says pigs are stupid, not these two.