Okay new complication - they're not eating enough. Fitzy weighs about 9 lbs, Daisy weighs 9.5ish lbs, and today they've eaten about 3.5 oz of wet food between the two of them (1 and a half 3oz cans). I know that's not enough food. They're still begging me for dry food - Daisy kept me up most of the night begging for it.
I'm not giving in, because I'd already weaned them to 1 Tbsp each per day, so I had to take it away altogether.
But since they were eating so little dry food before - I'd say maybe a quarter cup or less each of dry food per day - and the same or less wet food - maybe it's not any less food?
I'd been told it was one 5.5oz can of food per cat per day - we're nowhere near that. When I sprinkle some boiled turkey breast on top they just lick the turkey off.
And I don't want to get them used to having "treats" on top of their breakfast and dinner - I want them to just magically eat it!
I'm going explore the catinfo.org site tomorrow and see if there's good advice for switching kitties to a new food or switching to all wet.