Poor babies - I have never had a rescued little one have problems with albon and I look at it as a miracle drug for the ones having problems. Here is a link on the other drug your vet prescribed:
http://www.probios.com/pbpetprogram.pdf
Water can really do a number of these little dogs so it is best when traveling to only use bottled water.
Has anyone been giving new food/treats to your babies?
Let's hope the vet can get to the bottom of this and make everyone feel better.