I forgot to report what we found out about Abbie. It's mostly better news than I expected. What the vet initially thought was a mass in her gut seems to be a lot of extra air from all the panting she's been doing because she's in pain. Her chem panel came back fine--one of her liver enzymes is a little wacky, but she's old and has a history of that. The radiologist figured out what was causing all the pain: the connective tissue in her spine is bulging and pressing on her nerves.
Abbie's been on the dog version of bed rest for the past ten days or so. She's not allowed to run or sit up human-style, which she loves to do for some reason. My mom said she's doing okay, but we're taking her for a check-up on Wednesday right after I get off the plane.
I'm not sure how much I'll update over the next two weeks, but I'm sure I'll have lots of dopey pictures!