Oh, Polly, I'm so sorry! *hugs Polly* Did you know she was sick? They generally keep a brave face until it's too late to do anything, but that doesn't make it any easier to take.
Thank you SO much everyone, the kind words mean an awful lot! I laid Spartacus to rest under a little bush (shrubbery??) outside. My two feline and birdy darlings are doing well. I do not plan on getting another budgie.