A new cat shows up

My neighbor reported that a new black cat has shown up. She generally
feeds three black cats on her porch, Baby, Jet, and Shave. Shave is
her indoor/outdoor cat but the other two roam the block. Baby lives in
a home that I built for her that sits by my front door so I also feed
her. They're all neutered.

Last night I opened the door to feed Baby and the new cat is there as
well. Very skitish but she did eat the food after I closed the door.
She isn't eartipped so I guess that I'd best borrow the drop-trap and
see about getting an appointment for her at the ASPCA. I'll give it a
week or two to see what her habits are since last night was the first
time that I've seen her and she wasn't around for the morning feeding.