That's exactly what I had to do with Smokey. Feed her a teaspoon of A/D every two hours, around the clock, like a kitten! Fortunately this was only for three days. Then it was a tablespoon every 4 hours, etc. Within 2 weeks she was on her original diet and had recovered half a pound.

Good luck, and vibes to someone who would be cruel to someone whose cat is sick! Let me introduce you to a little concept called "karma."