First of all, that the chicken came first is a gemara in R”H on daf 11: – Likomasan Nivrau, they were created fully formed.
Second, without basing anything on evolution there is no reason to call chickens dinosaurs.
And, while this isn’t the place to argue about evolutionary theory fitting in with the Torah, I just have to ask: why do you want to believe in evolution? Because you definitely can’t convince me that by purely going through Chazal you came out that that was Chazal’s maskana.