I think it's possible that they are related, yes. I've never had issues with any other breeds and since the dwarves and the tendon issues are both coming out in some of the chicks (though others are just spectacular-looking, healthy kids), I'm thinking the Meier lines are the connection here. Meier produced many show-winning Delawares, but are somewhat inbred, from what I can gather. That is not unusual in show lines, really, but with the upside, there's always a downside. Isaac is Meier and seems at least one of his girls is part Meier lines. As you can see, Ike has no health issues, quite the opposite, but when his genes combine with that particular girl, these issues are coming out. With Kathy's help, I may be able to figure out which one she is and just not use her eggs, if I can distinguish them. Or, I can put her in a different pen entirely.