Our newest Spring chicks are ISA's from Townline. Being fascinated with the whole genetics thing (medical biochemist by trade) I also bought 6 RIW from Privett this Spring.
(Word of warning about Privett...whenever I get sexed pullets from them I ALWAYS get some roos. This time I ordered 6 pullet chicks, got one roo in the bunch. Neighbor got 10 sexed pullets form them, 2 were roos. Last year I ordered 6 EE's from them and 1 was a roo.) And yes, their customer service is awful but that's where our feed store gets their chicks from. Not wanting to order lots of chicks each year I can at least jump into one of their orders if I agree to get what Privett sells.
That being said, we have a very nice dark RIR roo and I'm hoping to breed him to my new RIW girls next Spring. I always sell a bunch of chicks in the Spring and it is nice to know roos from pullets on day 1. And I will keep a few for myself in the Spring and see how they match up in egglaying to the patented ISA's. I love Townlines service and prices, so if my own do not measure up to my standards I will continue to purchase from Townline.
This past Spring I crossed the RIR roo with the 3 Privett delawares we have. I'm not terribly impressed with the delawares from the egglaying standpoint but they did make some nice sexlink chicks. I didn't keep any, but the chick customers were happy to have known pullets. Our delawares just haven't layed eggs to write home about, compared to the RIR hens we had in the past. The delaware eggs have been smaller and they were very inconsistent layers over the winter, again compared to the RIR's. I also crossed the RIR roo with a couple of BR hens to make black sexlinks. They were also easy to sex at hatch. But I have not had good luck with BR temperments so I didn't keep the chicks. In fact, my current BR hens are looking to be re-homed in the very near future as the ISA's start laying soon. The BR's will be the first to go as they are the most aggressive birds I've had. They feather pick the other girls and generally bully everyone around. I know that others have had great luck with BR's, but not here. Mine were given to me and I believe they came from Ideal.
Great thread idea!