I have 9 calves that were born in November and December. I have 6 more coming in March and April. I'm hoping to sell the winter calves in June/July and I may keep the spring calves until I get another set of calves from the Winter calf momas. Anyway, when is the ideal time to wean and vaccinate the calves that were born in NOV/DEC? My cowboy wants to do everything in April. I'm just wondering if thas ideal. Thanks! Also, I'm considering implanting them with RevalorG when we work them in April, wondering if that'll have any effect on weight for the sale in June. Thanks!