Sparkle - just over 4 weeks

I am 99 percent sure that Sparkle is pregnant.  She has been extremely sucky and I see a bit of a  swell in her belly.  She is also very hungry and has twice raided the garbage can.  I have to be much more vigilant now in securing the gate to the kitchen.  I was going to do an ultrasound but decided that I'll just wait and see.  Either she is or she isn't.