I heard from the vet, and she did find a reason as to why Rosie has been smacking her lips, turning her nose up to her food bowl, and overall not acting herself. The vet first informed me that my old girl's renal values look good (they look great, actually), as does her thyroid level. So, after those tests came back normal, the vet decided to use some of Rosie's blood to do a pancreatic SNAP test, and that came back abnormal. Rosie has had pancreatitis in the past, and it seems that she's now having a flare-up.
Truthfully, as weird as it sounds, I'm considering this more or less good news. I'm thoroughly relieved that after three years of fighting kidney disease, Rosie's kidneys are still showing no signs of shutting down. It was also about three years ago that Rosie first had pancreatitis, and at that time it was a truly severe case that involved significant hepatitis. She pulled through that, and since this time we caught it very early and her vet seems optimistic, I have faith that Rosie can pull through again.
One of the worst things for me right now is that Rosie is going to be hospitalized for a couple of days, primarily because she is significantly dehydrated and because she could also certainly use some IV antibiotics and so forth. Although I can say that I'll try not to, I'm sure I'll be the worryingest worrywart during the entire time Rosie is away from home. My vet does allow humans to visit their furbabies during hospital stays, though, so I will be going to see Rosie tonight, tomorrow, and any other days that she'll be staying there. I'm sure I'll be calling them for updates as well, but luckily the staff and doctors are wonderful and patient people and have yet to block my calls.
Unfortunately, the vet did inform me that Rosie's dental disease has worsened significantly since her last appointment. Therefore, once she gets past this pancreatitis, it is likely she will need to undergo a dental. Since I can only stand to worry about Rosie's most pressing ailment right now, though, I'll worry about her teeth another day.
Any purrs and prayers you can spare are still very appreciated! And thank you so much for all of the purrs and prayers you've sent Rosie's way thus far!