I think my baby rat is sick.

Question
I recently (within a week) bought a baby rat, around 8 months old. I didn't notice anything odd when I purchased him. When I got home however, I noticed sneezing. I know that baby rats can sometimes go through nervous sneezing due to a environment change, so thats putting me at ease a little bit. But I would like to know. He has no discharge from the eyes or nose, when I listen to his tummy he sounds fine except for a slight squeak when he breaths. He eats and is active just like my adult male, which I quickly took away from the babies cage and into a different room. They were not in the same cage and the only interaction they had was a half hour or so in my bathtub a few days.

I am worried for the baby AND my other rat, I don't want either of them sick, let alone to die. Any advice?

Answer
Watch his symptoms. If they get worse in the next few days, he's legitimately sick and it isn't just a stressor reaction. If it gets better, you're probably fine. If he does get worse; you will need to see a vet and have him put on some medication (probably baytril, doxycycline or a more broad spectrum like trimethoprin), which will clear the symptoms up within 10 to 14 days. Don't stress much about it; respiratory problems are extremely common in rats, and when they're severely ill its VERY obvious. :)