I bought 6 chicks that were supposed to be less than a week old, but this one was allways way bigger than the rest.. Is it because its a rooster? The rest of my chicks should be about 2-3 weeks now.
That chick appears to be in the 2-3 week age range. I see nothing screaming cockerel but at this age sexing is a 50/50 guess. Try posting updated photos when the bird is 8-12 weeks of age.