Oh Johanna, I'm so sorry you didn't get an answer from your vet. Karen is right, call Tufts if only to find out if they can recommend somebody close to you. Their graduates work all over the country and they are very well trained.
Here are some sites you could check also:
http://www.vetinfo.com
http://merckvetmanual.com/mvm/index
I do hope you can find some help for Binxie boy. Hugs to you both from Alicia.