Cattle Talk

[FarmersTan]

I am a row crop farmer that has decided to run some cattle, and dont have much knowledge of livestock.  I have bread heifers that should start calving the first of May, what do i need to be doing to be ready when they start calving?  There is a lean to in the pasture they are in but that is it for shelter.  I do have access to a barn but i would prefer to leave them in there current pasture if possible.  Thats about all that i know to tell without being asked, the are Beefmasters if that makes a difference.