On the importance of aspect ratio in estimating canine dimensions

I have a challenge for anyone who reads this post (all two of you):

Here is a picture of my dog, Sandy.
Using only this picture for reference, please answer the following questions:

1. How tall is Sandy (floor to top of shoulder)?
2. How long is Sandy (tip of nose to base of tail, assuming her neck is stretched out)?
3. How much does Sandy weigh?

You may give your answers in Imperial or metric units. Estimates are fine. And if you have the urge, feel free to explain where your estimates came from. I'm especially interested to know if you have ever owned a dog, and if so, what kind(s).

If I get enough responses, I'll post an analysis (highly scientific and rigorous, of course). If I get only a few responses, I'll still post an analysis, but it'll be less interesting.

Regardless of the number of responses I get, in a week or two I'll post again explaining the rationale behind this challenge.