Commiserating with you! We've had our little orange feral cat home with us for 2 weeks and 3 days now. We fed her for about a week outside before we trapped her and had her spayed and tested and she got her shots. Had to laught when you mentioned the booster shot. We've in the same boat! She is in an extra large dog crate in the basement at the moment. We have a cardboard box with a "door" in it at one end of the crate and she hasn't come out of it yet when we're in the room. She does sit in the doorway now - at least she's now cowering in the corner. She still hisses and growls whenever we come near her. We can't give up as we don't think she would have made it with all of the below zero weather we've had and are still having. Just have to keep hanging in there and doing our best!