I'm not real big on ISA Browns. They are great egg producers, but are designed for commercial production and burn out after two years. And like most things that are bred for short-term commercial production, they have had a lot of the robustness of heritage breeds bred out of them. But that's my opinion and may not always be the case. In fact the worst chickens I ever had were Delawares (a heritage breed), they never thrived. Yet the other breeds of the same order did great. So I'm pretty sure it was just the Delawares or that particular batch from that hatchery that year. But because of that experience, I doubt I'll ever get Delawares again. I like blue Andalusians, but when I ordered a batch half of them were DOA. I got my money back and the remaining ones did great, but still. I doubt if I'll order blue Andalusians again either. But when I'm ready for new chicks, I would like to try sapphire gems. They look like Andalusians (no surprise since they are a hybrid), but the beauty of them is is that you'll get all blue ones and not a mixture of splashed and black ones, which I don't think are as pretty as the blue ones.