Odd yolks

[HipEMama]

I have a 10 month old cuckoo maran. She has been laying for about 4 months. Recently she took about 3 weeks off from laying. She resumed laying about a week ago. I cracked open the egg to find that the yolk was almost solid, almost like a soft boiled or poached egg) This was less than 10 minutes after being taken from the nest. She looks healthy and is eating and drinking normally. Her comb is a good color. Just weird yolks.

Any ideas what's going on here?

TIA