Once a day, 18:00, religiously, as a treat. And there's no way that I'd forget about it without them reminding me, they get really excited.

(We call it "papá" here, as if it was baby food - and the word is forbidden outside the wet food context. Frieda's face when I tell her "es ist Papázeit!" is hilariously cute: she dilates her pupils, gives me a "mrrwwwn!", and start dancing around me.)

Typically I buy it in cans, blend it with half can of water, then freeze it into ~1tbsp portions. They seem to enjoy it more this way - if I don't do it they lick the liquid, leave the solid on their dishes, and ask me for more. Then I just need to unfreeze two portions, make sure that there's no frozen bit, and serve.