I know what some of you guys are saying re: the tests and not being accurate. Thanks for the link, pendragoncorgis. I've heard that they have been ridiculously inaccurate when purebreds are tested.
That said, yeah, Rosanahart, I really can't see the greyhound at all in her. I've read that greys are usually quiet housedogs, only getting energetic when they're outside to run/exercise. My dog does not fit that at all. She's a little over 1 year old and is VERY energetic. Usually takes a couple of long walks to use up her energy resources. I know she's still basically a puppy, but she fits the coonhound profile of being very energetic. She also loves to jump up on her hind legs when she greets us and when she's in a playing mood. She has calmed a bit since she was a lot younger, but still has lots of energy to burn.
Thanks Whitewave, English Coonhound was another possibility I thought of, and the dog in the first picture especially looks quite a bit like mine. I'm thinking she's probably beagle/coonhound, the beagle maybe accounting for her slightly smaller size.
Thanks again guys for your input