So sorry I never got around to responding again! Thanks for the info... long story, but pretty sure she pulled a muscle after hubby scooped her up by the scruff of her neck and didn't get her back feet supported fast enough. Ended up not taking her to the vet after hours of observation, as everything indicated a simple pulled muscle. She's been recovering in an XL dog crate so she'd stop jumping up and down condo levels. She hasn't been on pain meds since my first post and we let her out to run around on the patio for a while tonight - her slight limp is now totally gone and she seems fully recovered.