I agree with Seth... If you want to hit the ground runnin in the cow/calf buisness, I would suggest starting fresh. Starting with heifers can be a gamble in itself... who knows if they will breed, and if so, will they raise the calf?? No calf means no profit! I would suggest selling the heifers you have, and picking up some black, black white face, or red pairs around the age of 3 to 6 years old.. Yes the initial investment is more, however, you will know that the cow is able to breed and have a calf.. There is always risk in doing this as well. Always keep in mind that there is a reason someone is selling their cow... Look to see if the cow is in good physical shape, structurally sound, has good udder quality and will allow the calf to nurse. If the calf is a larger calf, you do not need to be as concerned, but you still need to keep in mind that there is a reason the cow is for sale. Let's just hope that it is because the seller is needing a little extra cash. By purchasing pairs, you will recieve a portion of your money back when you sell the calves. Around where I live, the calf in the pair is usually worth more than the cow, so by selling the calf, you will ultimately get half of your money back. I would suggest putting these newly purchased cows with a good black bull. The majority of the black or red cows will throw a black calf, and black calves tend to sell at a premium. These are just my suggestions. I hope I could be of some help.