Honestly, it sucks to hear, but its all in the genetics of the animal. If they are going to have hair, they will.. and all you can do is promote hair growth, you cant actually make it grow. That's my take on it. Of course working hard never hurt though!
From my experience if you can break even on a calf, you are doing really well! Most of the time I plan on losing some money.. But like others have said, location is completely relevant to what it takes. Scout out your competition and know what you have to compete against. Remember, feeding is a...