So I recieved a pastel male several weeks ago (about 3) and he was fine when I got him off a guy on craigslist. Hes eatten for me twice, always in the same way; I offer, he sniffs, I turn off the lights and he tags. Well yesterday, when I was feeding him and my 50%pos het albino we went through the motions, but no tag on his part (my little female polished off his uneatten food).

My first thought went to RI so I held him up to my ear too see if there was any sound, and too my dismay, there was, but it was barely audible, and not frequent at all (not every time he took a breath). Would it be prudent for me to get into the vet? And is there anything I can do to make it not progress further till then? ('then' being midday tomorrow)