Anything out of the ordinary.
Lethargy, off food, RI, .... I rescued a water skink from a cat and it was on IM antibiotic injections for 3 weeks (every other day) and oral antibiotics 2x per day for 4 months. Came good and then suddenly a few weeks after the antibiotics were stopped suddenly had a relapse , sicked up evening meal and then woke to find it labouring for breath, was dead before I could get it back to be vet (within an hour). Was a real heart rending experience after all the time and care I'd put into caring for and helping the little skink recover and grow strong, even the vet said he was thriving not long before he took a turn for the worse and I'd become very fond the little guy who had become very tame.
Autopsy showed massive bacterial load in bloodwork (all germs from original injuries caused called by cat), also found an abscess inside body cavity that had been a reserviour for bacteria. Nasty antibiotic resistant bacteria on cat claws and in cat's mouths.
My elderly mother found this out too when her Siamese suddenly turned psycho and attacked her ankle one day, took over 12 months to finally get rid of the infection in her leg and several weeks in hospital on ultra strong antibiotic drips..
I'd be seeking a second opinion from a vet in a different practice - at least