Rabbits and piggies together

Hi not posted in a while. Ive noticed a local education centre is housing male rabbits and piggies together also feeding muslie. Ive tried to educate but they are pulling the old hes been in 5yrs with them and our vets check. If anyone knows how to get the message that they as a education facility should not be having this on a public display due to it making others think its fine please help.
Thank you
https://m.facebook.com/bedfontlakescountrypark/photos/a.737158682981225/3210866232277112/?type=3

It looks as though they have been provided with lots of information already in the comments.

I thought at first that it would be because they didn't want to deal with the issue of pairing up a single male guinea pig, but it looks as though there is more than one pig in there anyway.