Hi, thanks for all your responses, I'm a little miffed at this vet's advice, I don't think he knows much/really cares much about goldies, I trust the collective knowledge of KGW than any old trumpped-up 'vet'.
Yeah, thanks for re-affirming me of the diet I have my goldies on. I've got some Hikari lionhead pellets, went to my trusted lfs and asked for the best qual they've got.. I've read a lot about Hikari while I was working at an aquarium, did you know they've formulated a fish feed for fish in space!!!

-We got a glossy promotional mag for them through the mail at my old work.
I don't think Pro-gold is available in oz, shame, but we do get Hikari.
Yeah, Sian goldies need protien, especially in summer when they are growing, otherwise you can stunt their growth. the brineys and daphnia would be a good supplement for them, during winter they can survive just on veggies, -too much protien is difficult to digest when their metabolism slows down, can lead to food rotting in their gut. -A good thing to supplement in their gel food during winter is LOTs and I mean LOTS of wheatgerm!