Not quite sure what to make of this situation. I have had snakes with RI's before but my snake in the last couple of days has been making a noise like a whistle. I put her up to my ear and there is no popping or anything that i can hear. she recently ate a adult mouse on friday and is acting normal. she is a little dull looking like she may be ready to shed. just not quite sure if i should take her to the vet or maybe i am being paranoid. her temps are on the warm side are between 89-90 and on the coold side 80-83 humidity is at 50-55 percent. i know i should look in her mouth but not quite sure how to do that. her last shed was about 4 weeks ago.