Turn the aerator housing counterclockwise and remove it from the faucet. Pull the O-ring off the tip of the faucet spout with your finger. The O-ring prevents leaking between the housing and the faucet. Set the O-ring in a safe place until you are ready to reinstall the housing.
After that, they are referred to as yearlings or stirks if between one and two years of age. A castrated male is called a steer in the United States; older steers are often called bullocks in other parts of the world but in North America this term refers to a young bull.
I can't remember where I read this, but I believe the difference between a bullock and a steer has to do with the age at which the animal was castrated. A steer being any member of the term cattle that was castrated early in life, a bullock being cattle castrated after fully grown. A full grown bull being castrated would become a Bullock, bigger and stronger than a steer but with the placid nature of a steer, making it an ideal animal for draft work. Apr 2, 2016.