One of the duties I had to take over since Mitch broke his leg is giving one of the cats subcutaneous fluids twice a day, due to kidney disease. It's a geriatric cat problem. We already had one cat die from the same condition last year. The things they can treat animals for these days!
Luckily, Mitch has her trained with treats to submit to this. I'm sure it bothers her more than it does me. I have to pull her skin out, jab the needle under, turn the IV bag on and hand her treats. And she wants her treats!