I found the same thing! Stupid spastic birds! lol Sorry you lost two, I lost my entire flock except for one lone banty hen. This summer hasnt been kind to me or my chickens. I'll start over next spring, and just stick to hatchery or barnyard birds.
I have started a project. I will try and create my own line of Hambars. I have the NH Roo - and 8 to 12 BR Hens. I will start the breeding process this spring.