With the mass of the body vs feather growth of about a week old or so.. that has got to be a cornish x... 99% sure. Not good if you were looking for a pet. I suggest you check out the "meat bird" section and read up a bit on them. If you do with to have a pet instead of dinner fro the little guy, you should probably keep it on a restricted diet starting by week 4 or so, and make sure it moves around. Keep the feed high so he has to reach to eat. They often can devlop leg problems due to their rate of growth, and sometimes just die. It's not always like that, but I don't want to get your hopes up on a chick that runs around like a layer would. Maybe get a few other layer type chicks in case this little guy doesn't make it.
