I have a mixed hatchling that freed itself from the shell about 3 am CST, 4/25/2016. His/her yolk wasnt completely absorbed, and in the ensuing hours he/she has ruptured the remaining sac and drained it. Chick is lively, chirping well and moving around, although awkwardly. He/she still isn't fluffy and is now dragging this thing around behind them. Do I trim it? There's very little blood discharging from the sac, but they're so tiny, I don't know what's safe or not. Please help if able.