My cousin put all this info together for me. So I only wish I knew this before my Lexie died!!
http://www.yorkietalk.com/forums/gen...oflourine.html
Isoflurane is the anesthetic of choice. Don't use Halothane or any of the barbituates . Some vets will "mask" a tiny dog with Isoflurane rather than use the injectable and some vets will not intubate at all, but this depends on the type of surgery being performed. This is an excellent method whenever possible.
Last but not least, DO NOT ALLOW YOUR VET TO USE ANY KIND OF BARBITUATES TO ANESTHESIZE YOUR TOY DOG. MOST PARTICULARLY NOT PENTABARB. Many toy dogs have died needlessly because of UNINFORMED VETS WHO ARE DECADES BEHIND IN USE OF ANESTHETICS FOR TOY DOGS. If your vet thinks Isoflurane is too expensive and refuses to use it, then FIND ANOTHER VET THAT will use it. It could and probably will save your dog's life.
Do not let your vet use this anesthesia. Isoflurane and Sevoflurane are much more expensive for the vet to use, but dogs come out of anesthesia very quickly. If you let your vet use the barbituate anesthesia there is a strong possibility that your dog will not wake up!