I gave 0.5. I can test for as long as necessary - I can sleep at work lol!!! He has no history at all of ketones, and I think it was slightly less than an hour between HC food and retest. It was the sitter who came back to check on him after getting 5.4 at 1pm so not entirely sure of timings.
One thing I remembered but I can't even remember if this happened this morning or yesterday, but as I injected Rom I got a feeling that I had already injected him. If it was this morning, that accounts for the low reading. He will probably be high AM tomorrow, so I will inject 1u then as see where that takes us. I just wish I knew if this really happened or not!! I'm such a bad mum.