[Jessica84]

Pigs are more prone to E. coli. That would be one main concern with keeping them together but pigs are usually pretty good about going potty in designated areas so if in a large pen or pasture not too much of a risk.
But as someone who let their pig go where ever they wanted, including with the goats, I really suggest not doing it. Pigs and goats have two totally different body languages. So if one or the other is showing that they are totally annoyed by the other the other species is going to be totally clueless. This will end in fighting in two totally different ways also. Pigs have SHARP teeth and goats have thin skin. It doesn’t take much for a issue. Also pigs have wonderful sense of smells, so when the does come into heat there can be a issue. I know plenty of people do keep the both together but I won’t ever do that again. It didn’t end badly per say but it was definitely on its way of going south fast.