We have 2 adorable male crias born only a few months ago. They play with each other all day long and have settled into the female herd with their moms.However, they have started to both or individually crawl on the head or tail of one of the moms and then gotten into the posture for mating !Mom just ignores them. Is this normal?I have not seen this before. All the boys are in another pasture.I think it is impossible for them to get a female pregnant.What to do ? Perplexed Patricia