This sounds funny! The purpose of a blood test is to find out why things are "Off", the same as a human! If she doesn't do a simple "CBC", [Complete Blood Count] How will she know if the baby is sick, or needs med's etc? I have a number of birds, as other's here do, on seeds. The seed diet isn't the problem, the problem is what else is or isn't feed to the birds at the same time!!!!!!! I'm sorry, I can't except your Vet's excuse, I'd demand a blood test or get a new vet....Note: the fruits and veggies in "Calif blend" isn't no ware the same as fresh fruits and veggie's! Too much fruit cause wet poop, and pasta reduced the amount of liquid in the poop, so you can get a false reading how the poop is...A Grey will hide how sick he is till it's sometimes to late! survival instinct!!!!!
Get a blood test! Thanks Jayd