I have 2 cockerels and 3 pullets that came from Greenfire Farms for sale. They all have some white leakage. Their age varies from 8 to 12 weeks old. I have been told that these birds would probably produce offspring without leakage. I am not an expert and can make no guarantee based on experience. The cockerels have more leakage than the pullets. The pullets have just a bit round their neck.