Welcome!!!
All of the above is true. I have a tiny little girl. She was the runt of the litter. Her bros are almost double her weight.
My baby weighs 3.8 lbs. She was under 2 lbs when I got her. (My birthday gift) I was so worried she would get stepped on. I'm glad she is pushing 4 lbs. However, I'm not sure she will hit 5lbs. She is in perfect health. And will be spayed when the vet says she is old enough. If you get a tiny girl. Please don't breed her. Just enjoy your pet.
