I actually thought about having a pet pig. Asked a she'elah from a Masorti rav. Apparently, it's a no-no because it's a pig and a pig symbolises the Ultimate Treif. Now, I don't know if there are more lenient opinions out there or if you care altogether but I was bummed.

I had looked forward to being a rabbi strutting down the street with her pet pig on a leash, wearing a a t-shirt saying, "Love 'm, don't eat 'm".

:-)