Hey there CatLady,
~~ Three of the six strays I feed love raw chicken livers; they'll pass up anything else to eat them first. I get raw beef liver too as it's cheaper. One of them doesn't care, the other two will go for the chicken liver if there's a choice. The other three out of the six won't touch them. (One used to, but then stopped long ago.) I then discovered that one of those three will eat the raw meat from chicken thighs. I decided maybe it's a visual dark versus light thing or something for that cat.
There's a 7th cat that showed up about a month & a half ago. Lots of fighting etc, the other's couldn't stand
him! (Only one not TNR'd.) Things have started to mellow out between them all a bit now. That cat eats both the chicken livers & thigh meat, much prefering the thigh meat. I did chop that up recently & mixed it with wet food for all of them. They ate it, though I had too much wet food. Need to use less. They all eat dry food too, which is what everyone else feeds them. I wish
they'd find mice or something. Saw one with a mouse the other day--first time I'd seen that in the 8 months or so I've been feeding them.
As to whether they're strays or ferals, (going by what you wrote), 4 of them (that includes the new one) are most definitely strays--very loved pets I'm sure at one time. Three are feral, though I can hold one of them before he eats. One swats at me, but just cute little swats; the other rolls over on her back & stares at me. All
of them eat with me right in the middle of them.
I've also tried raw chicken giblets--not to their liking. Also not to their liking is any other beef. I tried cooking the giblets & chicken meat before--they wouldn't touch it. Yep... kitties are very finicky--no matter where they live.