Quite possibly. My girls are usually pretty much done with the chest bump by two months but some girls like to push their weight around even when grown!now if I know one of my polish tolbunt is a rooster and is chest bumping my white silkie does that make my white silkie a roo that is 2 months old if it chest bumps back? Sorry 4 the dumb question lol. I thought mybe the chicken know who is who maybe.