Try this first and if this does not work, as with my
kit, you resort to force feeding. I know it sounds cruel and you do feel like you are torturing your darling, but you may be saving their lives.
All of this should of course be cleared with you' re vet ahead of time. I found the best way to force feed is to back your cat in between you legs while kneeling, get a 25cc syringe or larger and suck up softened food, and little by little place it in your cats mouth, LOL?