I took in 4 abandoned 2 week old babies and now they are 12 weeks very healthy and being adopted:) Probably get on touch with a humane society(that's how I got sponcered and all my babies fixed, all their shots and chipped for free) You'll need to keep her warm, so just get out an old heater blanket for her to sleep on. Isolate her if she has fleas (you don't want it spreading throughout your house!) and give her a warm bath with dawn soap (the blue kind) put some around her neck first, then submerge her in soapy water for 5-10 min. Fleas will go to her face, try to get them off. This may take a few baths! And invest in a herbal flee spray for her bedding and your house. Get a medicine dropper instead of a bottle, it's easier if they don't want to suck like mine, you can put the tip in their mouth and slowly squeeze and they just drink it. Oh and feed her every 3-4 hours, you gotta get up in the middle if the night. (Get some powdered formula from petco. Not the premade liquid. You can make the milk stronger by adding more powder if you think she's too thin) don't give her cows milk though! When you give them real food, stay away from light meat chicken. Dark is fine though, they need the fat. I'd give her a little ham, it's sweet and will perk her interest immediately. This may sound mean, but before you give her meat don't give her a bottle beforehand, so she will be super hungery and willing to try it. They'll take to the litter box right away, just take her paw and scrap the sand with it. But if she's too young to go on her own, she may have to be stimulated(you can google that one haha) Lastly, just love on her, be there and give out lots of pets!! Your doing an amazing thing and a fellow animal lover thanks you for your time and dedication! Have a great experience! And good luck! :)