Thaks Lisa, my Marans do lay nice dark eggs but the welsummer starts out dark and then lightens up at the end of the cycle. The wyandotte is silver laced so you might be correct. I did take few shots so let me see what I have.Don't Marans and Welsummers lay a darker brown egg than Wyandotte? So if it came from a lighter brown egg, I'd guess Wyandotte (or is that too obvious?).
What color is the Wyandotte? I'm only familiar with crossing 'silver laced' x 'blue' and from that I got blues and blacks (solid females, leaky males).
Sounds like your chick might be partridge-ish?
I bet Kev can shed more light on it for you.
That's a shame about Sparkys eggs. I bet next time, she'll do better.
Wow look at all the posts !