I just bought a new young billy that is around 5 months and he hasn't had a CD&T vaccination when he was younger. I usually give my kids the vaccination at about 6 weeks and then again at about 10 weeks and my adult goats once a year. I am not sure whether to give him the two shots or just one. Should I give him the vaccination and then give him a follow up about a month later, or should I just give him one vaccination since he is older? Thanks.