It's yogurt with cucumber, oil, and herbs. Your father's library will have recipe books. You could make it.

[Hector is taking that 'quite good' and burying it very deep down to consider much later. He snorts as Alucard brushes at his hair, but he doesn't duck out of the touch. In his own way, he's just as needy and touch-starved as Alucard is.]

That just means we need to find something they haven't built up a tolerance to. Have you ever seen a baby otter? No one can resist that.