Whatever your chosen breed I, too, would advise against keeping on weaners originally purchased as meat animals, and breeding from them. Not all weaners sold for meat will have poor conformation or not meet the breed standard in some way, but many will and if you're new to pig keeping you'll find it difficult to differentiate. If you intend to start breeding I suggest buying registered pedigree stock from a reputable breeder, who will also provide plenty of advice if needed. If you can ind one a second or third time in-pig sow is a good way of starting out - she'll know what she's doing, even if you don't.