Happy Friday all! 
That's so sad about your daughter's dog. We sure get attached to our animals, don't we? Kids are resilient and will bounce back but I sure hate telling them about a sick or dying animal. Tuffy is by far the favorite here, none of the other horses have his silly personality.
I think leaving him at the vet is a good idea. You should at least be able to get a solid answer on the best course good or bad...not knowing what to do is what makes the decisions so hard.
Continued thoughts for you and Tuffy:)
Becky
Happy Friday all!