Do you have photos?
How much does she weigh? Three medium rats in one sitting seems like WAY too much to me, even if she's underweight (and even if she is, IMO stuffing an underweight snake with food all the time/that much right off the bat isn't the way to go). How often are you/do you plan on feeding her?
Do you see any bubbles around her nose/mouth? Whistling can be a sign of a respiratory infection (RI).
What are you keeping her in, what are the temps in the enclosure, and how are you measuring them?
Reply With Quote