Does anyone know if cat milk can do any harm? My main concern is the minerals in it contributing to crystals. By way of history, my male cat has always loved wet cat food. Recently he went off his food, but after a lot of experimenting I've found he will still only eat a little of wet but he'll happily eat dry. As he's not eating much wet, I was also thinking of offering him more dry and some cat milk (with a little water added).