Looks like all the TSC red pullet mix chicks. They all looked like the pic below and mine now all look like your big chick. I called them caramel chicks.
Mine are the last 3 pics. 4-5weeks old and new under a week old chicks, the 5 in the bottom left caramel chicks are the same as yours when little. The dark red chicks are RIRs, btw.
Mine are the last 3 pics. 4-5weeks old and new under a week old chicks, the 5 in the bottom left caramel chicks are the same as yours when little. The dark red chicks are RIRs, btw.



