hi, i just got two young male albino rats last weekend, and they both seemed very healthy. i play with them every day and i let them crawl around the floor near me, etc. tonight i noticed one of my rats, jem, started sneezing and making this weird muffled squeak that sounds like a snort or something. i'm really worried because he sat there for a little bit, kept making the noise, and it seemed like he had trouble breathing? but now he's running around the cage with will, and they both are eating and drinking. he is still making the noise though. what do i do? is it a URI? please help!