I'm so sorry Cpietra , it's hard to see our fuzzbutts get old. Did they say why Chrunchie had blood in her urine ? I know I keep repeating myself but , since Paddy had his urine blockage and made the switch to raw diet , every is fine and I can't believe how cheaper the raw diet is for cats , compare to premium canned food , and IMO , much better.
For Winnie , sometimes a bit of anti-inflammatories is just what they need to get a bit better. Sam has been on Deramaxx (not a med you can keep giving them long term though) and he's been doing pretty good.
Good luck with your oldies