It was Peanut that didn't want anything to do with Buddy. Buddy was trying his best, he was literally commando crawling up to Peanut to get closer to him. As when he walked up to Peanut, Peanut ran away chattering his teeth and rumblestrutting. So Buddy crawled nearer so peanut wouldn't react. lol. He was trying his best but it ended with Peanut lunging at Buddy quite violently. So I decided to separate them as at every turn Peanut wanted away from Buddy. I didn't think it was fair. On either of them and a fight would be inevitable.
Peanut was a lone piggie for 7 months before I got him, this may be the problem. He's probably best alone with interaction through the bars.