The grass is up and so is the weather. The babes are getting big! Time to start putting the stamp on them and all their vaccines. Going to start with the first calf heifers. Their babies are 2 1/2 to 3 months old now. It's best to give the babies their vaccines after 8 weeks old. They have all mama's anti bodies in their system when they are born and sip that first gulp of milk. Then the anti bodies wear away and they need their own immune system to grow, grow, grow!