I think you should take it to heart.
Anything I have ever read indicates one should really not mix species at all. The two animals have different dietary needs and different behaviors. Personally, I would not consider putting together chins and pigs.
Their diet needs are VERY different, chins can have very little veggies, and pigs need alot of them. Chins need a CHINCHILLA pellet, and pigs a GUINEA PIG pellet. Pigs are up during the day, chins are up during the night. Chinchilla´s need a cage that is HIGH , instead of wide and long, and pigs prefer (in most cases) cages that are wide and long. Pigs are laid back, chins are active.
Now, though I would never house them together, my two adult chinchillas have play time with all of my pigs. They will play with each other just like they are another pig/chinchilla. And in the end, when everyone is tired from a good run the chins will cuddle up with hte pigs and give them a groom!
Chinchilla´s do spray, urin as a defence. When they get scared, FEMALES will spray- males have a hard time spraying, and usually won´t.
Good for you thinking chinchilla´s are ugly. My chinchillas happen to be very cute, like it or not.(ok, i´m stoping here!) . I agree with Lynx, if you don´t have any thing nice to say, dont say it at all. There was actually no need for your comment in this thread, anyway. JMO.
My Chinchillas are VERY cute too!
It would actually be hard to keep the chins from eating veggies, because they just steal everything out of the other chins mouths- LOL. Floor time would be your best, just keep in mind that they may not get along. Like Lisam said the best friend for a guinea pig is another pig of the same sex. And the same goes for a chinchilla.
Animal lover- I think chinchilla´s make great pets, for the right owners. They do need a lot of time, are very active, are up during the night, and are very expensive for the fist inital costs. That´s about the only downside(if you can call it a down side) to having a chinchilla. If you want more info on them I suggest either http://www.kritter-korner.org or http://www.chins-n-quills.com Both are VERY good forums that deal with chinchilla´s.