I have cannibals in my flock who have pecked the toenail off my SLWyandotte twice now. If I catch who is starting it she will be dinner. If the one didn't start it the others wouldn't follow. It's one of my California Whites but I'm not sure which one.
Anyhow...hold the chicken. Closely. Try not to let it peck your eyes out. Put a washcloth or something else damp over the toe till the bleeding stops...about 5 minutes. Use a little pressure. Then, gently, apply some superglue.
Let the superglue dry. In case it's being helped off like my SLW's was, coat the toe liberally with bag balm or Vick's Vaporub. The other birds will detest the taste and let the toe alone.
It's worked for me two times. As soon as the babies we're getting from Cackle tomorrow are grown enough to lay eggs, the California Whites will all be soup stock and so will the 3 other aggressive birds in my flock. If I had more layers or wasn't so spoiled I won't touch store eggs any more I'd cull them now.
Trisha in MO