Question Regarding Health

I became a first time piggie wrangler when I got my 2 piggies from he pet store a week ago.

One of them seems to have a lightly swollen right eye and mild funk buildup - but only in the right eye.

I've read pet store guinea pigs are highly susceptible to URIs the first couple weeks after you get them. Could also be conjunctivitis. I'm not sure.

He is acting totally normal though. Normal appetite, popcorns with his brother, runs laps around the cage, rumblestruts for dominance every 15 minutes (lol), etc.

I was wondering if any of you have had any experience with this and have any suggestions.

Thanks!