Hello, I am new to keeping snakes, I've had a ball python normal for abt. 8mos now and I just acquired an adult female Hogg Island boa. I have had her for almost 2 weeks and I have fed her once, 3 days ago-3 medium rats, because it's what I had on hand and she seems skinny to me. Which leads to my first question, how can I tell if she is a healthy weight? She has folds of skin on her neck and just looks thin, even for a slender snake.
Also she has very audible breathing and appears to breathe a lot faster than my adult ball python. At first I thought she was hissing quietly at me when I first got her because of being bought and taken to a new place by a new person while being in the blue, pre shed. But I held her today for the first time and noticed that every breath she exhales sounds forced with a slight whistle and a little the same as she starts to inhale. Is it possible she's just anxious and hissing with every breath? She seemed anxious at first when I got her out of her bin, but I got her to calm down and perch on my shoulder for a few minutes before I put her up but the audible breathing/whistle never stopped. These might be stupid questions but please help?