Hi- I have 5 rats. They sneeze every once in a while, but that could be allergies, dust, or dirt. I'm not worrying about it. Did somebody say hyper? Even though my 5 girls have eachother to wear them out, they still have plenty of energy for when I let them out (which is a lot) So, don't worry about either of the problems, unless the sneezing gets worse. And about the, um, bulges, if they don't show up after about a month or two after birth 'he' is definitely a 'she'. Trust me. I know this because my first rat gave birth to 10 babies almost as soon as I got her, and I had to see which were girls and boys. (rats reproduce fast, so you gotta know within 28 days or the multiplication will begin) David is right, stick to the site. It's awesome! Welcome. ~Jessica~