CanadianBuckeye
Songster
I don't think they are ISA's; no golden chipmunk markings. But, if they are, then like you said, I will have some good egg production. Although, I do have black sex links and they are beasts when it comes to egg production. With my luck and chickens, likely they will be lack-luster birds.
Sometimes serendipity works in your favour and these will be the best egg layers ever!
Hens go broody when you don’t want them to… and won’t go broody when you do. 