I'm gonna preface this with I'm not trying to be rude, but I've read that article/link several times and maybe i just don't get it? I don't understand "will begin to show at 2.4" I thought I was testing blood ketones at home and he was good... Never got to a 1.0 at home testing blood ketones.
Now that he's tested high at the vet for urine ketones, I kinda don't trust the meter/blood test? I guess I don't need to understand then? He was always 0.9 or less. I dunno...

I'm just really sad right now. Sorry.
To be clear, vet tested urine for ketones and told me over phone he was 2+. I can't even find the chart for urine ketones to see where this falls, but two plus sounds bad.