I give Oliver subQ fluids when necessary. You can buy the fluids by the case lot, just go talk with your local pharmacy and they can order them for you. The needles and tubing I buy on line, depending upon what state you are in you might need a prescription for the needles, but the website will let you know that.

I have a hook that I hung on the powder room door and I have Oliver on the floor (it goes faster that way). I also give him a LITTLE bit of Fancy Feast to keep him "occupied" while I give him the fluids (he is really food motivated). That way we can both walk out of the room with no blood shed