guinea pig... skinny

Question
I have a guinea pig that doesn't seem to eat as much as my other one. She is to skinny for my liking and today I think I have noticed that she might be breathing weirdly. Also she seems to sneeze once a day. Any answers you can give me would help!  

Answer
She is probably getting an upper respiratory infection. The best thing to do would be to remove her from that cage, and place her in a separate one, that way you could monitor her food and water in take, then treat her for a URI, all of the information for treatment is on my website, http://woopets.bravehost.com  . If she is not eating at all or drinking, then she will need to see a vet to get antibiotics to also add to the treatment listed on my website.
Brittany
PWOOBY@aol.com