Is it possible to do this too much or hurt them while doing it??? It seems like the fluid inside is rolling around when I turn them to candle?? Thanks for any help!
You aren't really supposed to 'roll' them around. Just hold it still and wait for the swimmer to move into view. Or do like I do, and just check the veins. If they are visible, it's still alive. I candle on day 7-10, 14, and 17 or 18. I think most people do this. The problem with candling too much is the movement that is caused by 'rolling' them, and the decrease in temp. Also the germ factor comes in to play the more they are handled.
i think it's possible to hurt them if you have them out too long. when i was hatching my chicks, we always tried to hurry the candeling.