How to medicate 1/2 feral cat ???

I have 3 half feral cats that someone dumped here over a year ago. A Mom and her two kittens. Mom's now about 2, and kittens a little over a year. I trapped them all using a live trap and had them spayed, shots, etc.

Mom, who we named Ginger, was always the friendliest. She will rub your leg, and want petted, but I can't confine her in any way, or she becomes 18 claws on steroids. The two girls will only allow a couple head pats, and then only from my Mother, then they are off. (Mom is the one who usually feeds them, so they like her better than me!)

Well, Ginger has a bladder infection of some sort. She's trying to go every few minutes, and scooting herself on the grass from irriation. My vet called in Amoxicillin - you know, the pink liquid --- well, she will have none of it. We tried mixing it into cottage cheese, into cat foods of various types, and even thawed some raw hamburger to mix it in... but she takes one sniff and literally runs away. But, when she comes back, she will eat the same items without the meds! Smart girl that Ginger.....

I called vet back, they said try to get her into a dog crate to confine her, then do not leave her with a bowl of dry.... maybe if she's real hungry, she will eat it. If not, I am to try to get her into a cat carrier (YIKES) and bring her in - they will give her meds by injection, maybe even keep her so they can medicate her. Even though she turns from Devil cat to perfect little lady at the vets, I'd rather not stress herby taking her in if I don't have to.

Anyone have any ideas for me to try?

Jules - and miserable Ginger :-(