hi. a few minutes ago, one of my boys freddie made a weird coughing sound, so i went to see if he was okay and saw that he'd coughed up a small puddle of phlegmy stuff, but at the same time it seems too watery to be phlegm. it was still hanging from his mouth and i was super scared. he seems okay now, he's gone to sleep in his hammock and theres still some of the stuff on his chin. i dont know what this was, as i know rats cant vomit because they dont have a gag reflex. can anyone shed some light? is this a sign of a medical probelm? or is this normal?