No, all of my anacondas have all fed fine on f/t rodents. I have heard of people giving their condas fish before, but I wouldn't recommend that over anything, also, it's not really in their main diet as they grow. Fish should totally be a last resort. If you can't get your conda to eat, I can probably help you out with some tips, but deffidently try rodents and then quail at first, not fish..

~Ben