The docs have lowered my oxygen to 2litres per whatever it is (what is it someone?) and I'm managing on that at rest. It was put down to one litre but I found that awkward, too borderline for confidence. A gas test showed everything is OK.
The pneumonia has been nuked by the IV antibiotics.
So, all being well I should be home this week! On oxygen.
Yay!
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Bailey the gerbil got the all clear from the vet today and will be back home with his brother after a period of isolation, having had a leg amputated..