Sparta Thinks She's a Lap Dog

Sparta is now 7 months old and if she isn't 25 pounds yet, she's very close. She's now as tall as Scout, yet her legs are longer than Scout's (clearly she still has some growing to do!) and her body is longer than Scout's.

And, despite the fact she is still growing bigger and bigger, she still insists on being a lap dog. I wonder how long we can accommodate her?