RIP Doormat

So this poor unoffensive doormat had been sitting by the front door all the three months that Tali has been in our care.  It has never been a problem.. until today.  Got home from work, and there was a roughly 4-5" circle missing from it entirely (backing, yarn, everything gone), and about a 1" strip unraveled and mostly gone from one edge.  While I was walking her, she horked up about a foot strip of yarn in chunks (while we were moving!  She can vomit as well as pooping while she runs- quite a talent!), and I also found a big chunk of yarn bits in the backyard when I was cleaning up later.  Out comes the bitter apple spray again, and up come the doormats when we are not home.