Is there any kind of treat or different food you can give to a goldfish to supplement the usual falkes. I know flakes have everything they need, but I just wondered if there was anything else they can eat...
You can try the occasional prawn or a squashed pea. A small worm might be welcome and live daphnia from the pet shop is welcome.
These are treats though and should be offered once or twice a week and make sure to watch them eat it....and remove it if they leave any or don't like it. Do not over feed on any account !!!
If I was you I would feed my goldfish on bloodworm two or three times a week. Only feed them what they eat for ten minutes and remove the excess! Hope this helps!