Wiktionary
get up with the chickens
vb. (context idiomatic English) to wake up early
Usage examples of "get up with the chickens".
Not only did I get up with the chickens, I went to bed with them as well, but I still had time for reading and for playing my guitar.
Back home, you may get up with the chickens, but in this neck of the woods, the only chickens are in the moo goo gai pan.