A communications snafu. The Vets should have called, and verified the information, and the Pats, with something of this size happening on their property, at the stadium, probably could have taken a little more care and checked it out before the problem occured.
In either case, its strictly a communications snafu and hopefully the Pats will do something to replace what wasn't done...not that it was their fault, but IMO, it would be a nice gesture on their part, and knowing the Pats front office, I believe they will do something.