5 toed Crested Cream Legbar

[Bubblegum85]

I picked up 5 CLB about a month ago. I saw the mum and dad of the babies when we visited. I'm cleaning their brooder and see that one of the chicks has 5 toes, what happened here?

 

[BlueBaby]

I wonder if it has some Silver Grey Dorking in there somewhere. The coloring is also right for a female if it does.