[Highland Park] lost ? cat

HI I live on elgin, between st. clair and euclid. there has been a lovely friendly fuzzy cat trying to get into my house: thick russian blue type fur, black with orange bits, an orange back left toe, green and white striped flea collar. VERY hungry, tries to drink water from my frozen fish pond. I've been feeding the cat, but can't let her in--have three cats already... but she's cuter than a button, very affectionate, and boy, wants in! does anyone OWN this cat, and lets her out into the cold and wet? annie