UPDATE FROM ADOPTERS:
Namoosh (Mooshie), formerly Serenity, is six months old now. She still loves to sit wrapped around the back of my neck -- this was easier when she was 11 pounds. See previous post HERE.
She is now 22" tall, 24" long (neck to hips) and weighs 55 pounds! Mooshie is very full of energy, likes her pool and water, and especially likes her big brother, Mugs.