HELP!! Young chickens vanished without a trace!!

[Betsy]

Last night I counted my batch of three month old chicks..and three were missing!! I counted them twice this morning, and was still off three! It's driving me nuts because their pen can't be anymore secure-one side is my hen house, the other three are made out of chain link fencing and we've made a lean to of tin on one side to give them shelter. The bottom is mostly surround by wood and rocks, and I see no signs of digging. The top is covered with snow fence so hawks can't get in. I haven't seen signs of blood, feathers etc and it seems like if a rat, weasel, or snake got in I would see something like feathers or blood. Is it possible that it's a human predator??
Thanks for any help-this is really concerning me!!

 

[schmoo]

I've read that coons can reach in and grab chicks. Are they small enough to fit through the fence?

 

[Southern28Chick]

Snakes won't leave blood or feathers but I can't see 1 snake eating three 3 month olds.

 

[Betsy]

No, they're not big enough to fit through the fence..and at night when the coons are out they're in their lean to where the coons can't reach through.

 

[silkiechicken]

I would say a snake would be a possibility. They will leave no trace of blood and they will just leave with three bumps...

 

[Poison Ivy]

Is the top of the run secure with no small openings? I had a raccoon squeeze between the top netting and the gate once and kill 6 of my birds. Took me a couple days to find the spot where they were getting in. Hope you find them safe and just wondering about.