I haven't been on for a few days, so thanks for all the replies.
@ohbell: thanks for the comment on the photo. He does that for his wet food, which used to be a treat, but is now his sole diet. If you lower the dish to where he can reach it, he'll raise his paw up and try to pull the plate down to the floor so he can eat. Super cute! I think the dog must have seen him doing that, because now she does it to (to a certain extent) when being fed.
@Wendy: we realized we weren't being consistent and starting doing that at 0.25U and maintained for 3 days, then went up to 0.5U starting last night. I appreciate the advice.
The one thing my wife dislikes about the ReliOn 5/16" syringes is that the plunger is stiffer than the Comfort brand 1/2" and it's hard to twist the plunger to fine tune the dose. The issue with the 1/2" is that they are not available in 0.5U markings and when you're doing below 1U, it's hard enough to measure with the 0.5U markings, much less the 1U markings. (I know there are aids such as a paper scale and calipers.)