Geez! If your going to be in the cattle business your going to have to learn to do more on your own or all your profits will fly right out the window. It SHOULD be a piece of cake to haul 3 heifers of any size, barring their not 9 mts bred, 6 hrs. Your truck will handle pulling them no problem - you are going to need ready access to a trailer if you have cows, espicially heifers. Think about it, what happens if one of them has a problem calving or what ever, you need to be able to take her to the vet right then - not when someone can fit you in their schedule to haul her for you. Look in your local classifieds or americanclassifieds.com and find you a decent used bumper pull trailer (I would never have a bumper pull but for a F150 it would probably be better then a gooseneck) You could get away with a smaller trailer but a 16' is a good all around size. Depending on the width you find you should be able to haul 6 grown cows easily in a 16' ft - now stopping 6 cows and the trailer is a different story. Try to get a trailer with brakes and put in a brake box in your truck. Make sure to calibrate your box BEFORE you put in any animals. The trailer should be able to stop the truck, then calibrate it again when you load it.