
Hi Jean,
Won't the change in no charge for prescriptions from vets help a little with some of the meds and off-set a portion of expense?
As to phenobarb, I know years ago when the EU something or other directive came in about no licensing of human meds for animals pheno and pot.brom were marked for withdrawal in favour of Mycoline (sp) but if a vet believed an individual animal benefited more from the previous drugs it could still be given.
Not much help on the blood test but I think I'd check with a few vet practices and find out what the general opinion was. It's certainly worth shopping around if your son has two dogs which between them are causing high vet fees.
Sorry not to be of more help. Good luck, Teri :)