@Kolyo,
Oh, yeah. Little K fostered her cat with diabetes for years and that was pretty life-constraining for her. Drops and nasal flicks (whatever you call them) bother me, as me - I've got a thing about dogs' faces and don't want to mess with them, though I use drops every day for my own eyes (not diabetes).
I suppose you have had talks with mom? I am guessing she can't deprive that look in the cat's eyes and the vocal pleas at food time.
I was worried about diabetes first, because Katy was a fair chub according to records just before I got her in May this year - 72+ pounds, and 67 + the week I got her. Now she's at 55.7, just right for her size and build. The waltzing tub has stopped going back and forth.
"(The way she feeds that thing you'd think she was trying to invent a new version of foie gras.)"
That was a great funny/sad sentence.