Special Feeder Sales will be cattle that qualify for GLA VAC1 or GLA VAC2 only. If you like selling at the feeder specials it takes some planning to get them vaccinated properly. they have to be vaccinated according to the program rules 21 days or more before the sale date, GLA VAC2 cattle also need proper timing between shots (14-28 days) and weaned 45 days or more before sale date. Another change in GLA VAC program is that clamping is an unacceptable method of making steers out of bulls. Bulls must be either castrated (knife cut) or banded properly.