Some are more vigorous than others. I don't feed them all three times, but one in particular seems to need 3 feedings. Sorry for the vague IP. At 72-ish the others behave predictably after two feedings. I'm probably the only one on here doing this, but it seems to work for me. I use the Ischia pretty much every week so that only gets fed once (I'd have a mess on my hands if I fed that three times). The others I usually feed twice.