Re raw potatoes making pigs ill: Hilarysmum mentioned some time ago what it was called, I can't remember right now what it was but a large amount (a bucket full a day or so?) of raw potatoes could kill a pig - so just a few doesn't hurt.
We used to boil potatoes when we only had 5 little piggies - they ate it all so quickly we stopped doing it and gave them all sorts of other fruit & vegetables.
Leghorn, are you boars and gilts together? In which case you need to separate them straight away or you could have baby piggies... Plus once the boars have mated, there's a hormone that makes their meat smell. The meat of an affected boar is often called 'pissy pork' because it does smell of wee. Only a minority of people can smell it but I'm one of them and it definitely puts you off eating it. The gilts don't get that problem, so you can keep them for several months longer, but boars usually go at 6 months.
Ours don't like carrots, but they're mad about plums and have eaten hundreds of apples already this summer.