Stray cat outside of my house

Always been a cat lover, and intended to have one when I move out and get a place for myself. That said, I found a stray cat outside my house today coming home from my internship. Thought it was cute, and whatnot. Even played with it for a little bit. I found that this cat has absolutely no body fat, sounds like it has trouble breathing (I can hear it breathe, so I'm assuming there's a problem; I"m not sure if cats usually make a sound when they're normally breathing), and won't leave my porch. Played with it around 7pm, then went to eat dinner and whatnot. My family gave it some milk, and it lapped it up eagerly. Afterwards, we tried to shoo it away, but it wouldn't budge. We yelled, made threatening gestures at it and whatnot, and it wouldn't budge.

I just went to check on it like ten minutes ago, and to my horror it was sitting down in front of the door, and when I opened the door, it tried to come inside my house. I had no choice but to close the door and deny it its entrance (stray cat; don't know what kinds of diseases it has, etc., and my mom and brother are slightly allergic to cats). I'm sure if I go check again it'll try to do the same thing.

My estimate is that this cat will most likely die within the week even with us giving it milk (it was so starved). I can't keep this cat for reasons stated above, and it won't move away. What to do?

I'd say take it to a shelter, but it would probably end up dying there if only at a later date. Probably best just to ignore it.

Mm...

I just hope I'm wrong and it doesn't die to starvation any time soon.

If you truly care about this cat, I would take it to a vet to check to see if it has any sort of problems. If it doesn't, I would consider the options. Ask your family about it, and if you can't keep it, you should give it to a shelter.

Not withstanding the thought that you may not even want it.

You basically made it know that it would be able to survive through you, now you've signed yourself in for some siege. What you can do is limited; either ignore it - although from the way you described her she's in a really bad state, and will most likely die if she doesn't have the luck of finding someone else which actually allows her in soon. It's more likely that she will simply die, though, and I suppose it's not much of a concern as long as she's not dead in front of your door, why else would you try to "shoo" it away? - or help her improve, which, in most cases, would be through spending money for a veterinarian to get a more detailed information on her state. Alternatively take a middle route and simply keep on feeding her from a distance, depending on her state it's not unlikely that she's better off being just ignored by you, though. At least you're not giving her any hope that way. I suppose it depends on your personality and what your sense of righteousness tells you you'd "need" to do. I, personally, wouldn't have given her anything in the first place if she had approached me.

I think I need agree with some of the others and say take the cat to the vet, then to the nearest shelter - preferably a no-kill shelter. However, if the vet finds something medically wrong with the cat, it'll be more humane to have it put to sleep then let it die in the street.

i would take it to a vet too, letting it die of starvation is too cruel.

I've always been an animal lover. I think you should take care of it for a week, and ask your neighbors if they want it, or take it to a shelter.
EDIT: Or take it to a vet.

The best thing you can do is feed it, while taking nutrition into account, maybe take them to the vet for shots or whatever, and hope for the best. Stray and/or feral cats don't have a really long lifespan. Having the experience that I do with the strays that have been coming around for as long as I can remember, they're is a chance that by providing any care will open your property up as a breeding ground. Also, avoid giving them milk unless you have to, and then try to get the special
"cat formula" or whatever the hell it is. Apparently adult cats are lactose intolerant and even when they're kittens you should be careful about what you feed them. Most milk that humans have access to is cow's milk, and cats aren't cows.

Avoid sending any animal to a shelter. The majority of the well established shelters have a strong tendency to kill the animals they can't get rid of, and if they don't it's more like hell than a safe haven.

Stray cats. I'm more of a cat person than dog, so I sympathyze. It's really heartbreaking for me to shoo away cats that come by our gates after supper (I feed my father's dogs after we eat supper), they ust sit, look at you and purr gently, sometimes brushes between my legs just to get a few chunks of meat for the night.

I'm really looking forward to get out of my parents' house (my old peeps are dog enthusiasts) so I can get a flat and my own cat.

Once there was this stray cat I saw at night. Bony, heterochromatic, and small. About 9-12 weeks old. I was feeding the dogs. It was mewing softly. I shooed it away immediately lest the dogs bark at it and wake up my old man. As it was leaving, I was looking at the cat. Suddenly it collapsed on the pavement. I rushed to look at the cat and it was almost dead from starvation. Our subdivision back then has removed all trash bins on the roadside and admonished all residents to keep trash inside until the dumptrucks come, so most strays then are without food. I took three fish heads my dogs were about to eat, took a disposable tupperware and fed the poor kitten. After it ate I took it with me in my bicycle and rode to the nearest subdivision I knew that still had trash bins. I left the cat there.

Three weeks later I checked on the cat. It gained back its normal body mass and was happily looting the trash bins. As a farewell gift I gave it half a hotdog.

And my answer to your question is that you find a place full of dumpsters (make sure it's food dumps) and leave it there. It has food, and stray cats can eat.

I suggest takeing it to a vet and if that doesn't help or you can't just bring it to a shelter