Funny this thread should pop up LOL...I have a cat (the "wild" momma, Seven) that needs medication for an inner ear infection.
I had to order a "cat bag" from the vet in order to hold her still (you put the cat in the bag and the only thing exposed is her head) but I can't get her into the bag with just two hands. Four hands would make it a lot easier to attempt LOL...she's feisty enough that I think she just might get out of it then too though!
Other great uses...sweep with one set, mop with the other...salads would take half the time to prepare LOL and just think of the massage you could get from a good massuese with four arms!!!