Many people on the rawfeeding yahoo list I'm on feed pork - like someone else said, there are always going to be some people for and some against every aspect of raw feeding / BARF.
When I was feeding raw, I fed mainly pork neck bones (cut large) and chicken leg quarters, with beef or pork liver and raw eggs weekly and other things occasionally (as they were on sale / affordable). My dogs looked and acted great, and never had a problem with any of it. The ONLY reason I quit feeding recently is my freezer died and we haven't been able to afford another. Hopefully we will soon, as I'm not liking the loads left in the yard from switching back to kibble, and some skin allergies have cropped up. And deer season is here, I need to put a bug in my hubby's hunting friend's ears to give me the scraps! Last year, my dogs feasted on several spine / ribcages he brought home. It was below freezing out, and I just kept them out in the yard for the dogs to gnaw on until they were gone. Free food, yay!!!!!
And Eli, many dogs will get the runs from ANY new food, just because their system isn't used to it. Just because they got it from feeding pork once does not mean it's bad for them, just that their system needed time to adjust.