That works for me!!! Usually when you walk in the shelter, the right one finds you somehow and you walk out with something totally different than you walked in wanting!! lol

If you want medium dog size though and you're set on one of those 3 I would go with the Border since the other 2 get pretty large most of the time.

I forgot, you're LOTS younger than I am with LOTS more energy...you're the puppy kind of girl!!! lol

Good luck!!