In the long run, you'll get more calories out of the isa brown than you will out of the CX.
It is rather startling to see the 2 compared side by side at that age.
You'll probably have a dozen chicken dinners before you eat your first egg. lol
I've got a similar pic at that age...so funny!!! My CX and the DP bird were free ranged together and fed the same ration, so not as big a difference in size but still remarkable difference all the same. The one on the left is a little cockerel and the CX is a pullet.
You ridiculous clown, did you think you could get away with it? This is my favorite tiny ad!
Experience months or even years of natural building and growing your own food