I like J because Rhode Island Red sounds funniest.
I also like the three reasons why he selected that sort of chicken.
Of all the chickens I have ever known Rhode Island Red does, indeed, have the most comic appeal and would be chosen by an author simply for that value.
I love the sound chickens make when, in a group they sort of mumble to themselves. I wonder if it is akin to a cat's purr.
Who knows about chickens. Do they "purr"?