Well, looks like the majority opinion is skinny-tailed long-legged fox of some sort! I'll continue to keep an eye out at the park, maybe one day we'll spot him again! Shai's mom - coy-dogs? I know we have coyotes, one got hit on the road in front of my neighbors last week. And I haven't heard any sightings of cougars close by, although they've been seen north of here in Mich. and in Illinois.
Kfamr- believe it or not, I've brushed two grocery bags full of fur off that Star girl already! She's finally about done shedding. And while she may need a long brushing, she sure doesn't enjoy it- it takes two of us to hold her still, she reeeaaaally doesn't like being brushed! LOL!
Buttercup - LOL! definitely not a kangaroo, but here's Sherman doing his "Kangaroo" pose:

Thanks for the opinions, everyone!