Re: 430 held back and stuck to 1.50
There are at least two companies that sell meters that test ketones in the blood. I have a Nova Max Plus, because Bob was impossible to test from the litter box samples. The strips are outrageously expensive though. They pretty much will give the meters away - I've seen promotions where it's "get the meter free". The meter also can test BG (different strips), so it served as my backup for BG tests. The ketone strips weren't available locally, so had to buy them online, and they can cost anywhere between $2 and $5 each, depending on where you can find them. Sometimes on Ebay, sometimes direct from Walgreens.
The other tricks are to substitute aquarium gravel for litter (won't soak it up), or hide some saran wrap under the litter so you get a puddle you can stick the ketostix in. You may have already heard that, or tried them?
Carl