Peson Concerned for Well Being of Children: Please Help?

I am posting this here and seeking advice as I am sure that there are people here who are more experienced than I in dealing with children in trouble. I am seeking advice on whether or not to act; as it seems, if I don't act, harm could come because of my inaction; but if I do act, harm could come because of my action. I am considering contacting authorities for a wellness check on a family.There are four children who have touched my life whom I am very concerned about and I don't know what to do. I don't know which is the "right" thing to do. They are siblings. We'll call them Fourteen, Twelve, Eight and Seven.I encountered these children at my job at a convenience store. They live just caddy-corner from the store and shop with us often.Fourteen may be older than that; I don't know. When I first met her, she had tried to dye a streak of blue in her hair. She had the blue streak all right; but also bleached, blotchy spots everywhere; and that dye was all over her hands, her clothes, her face; and that smell of the color was thick. Poor thing was so self-conscious; her unease radiated like a neon light. I preserved her dignity and held my professionalism, of course, but she was just so wonderfully ... human. She comes in with her siblings often. She's soft spoken, says little, and always gentle with the younger children. She is a wonderful human being.Twelve is a fair haired little girl. When she comes in on her own, she converses with the staff readily; but if she comes in with older kids, she becomes withdrawn and quiet, preferring the company of the "big girls" and then is uncomfortable with staff addressing her. She has an image to protect, dontchaknow. Twelve once told me that when she grew up, she wanted to be "one of those people who make the rules" (politician) so that she "could right the wrongs of the world". The little girl, Eight, is a favored among the staff. She is probably the smartest little girl I've ever met. She's well behaved, ladylike, and can tell me how much she's spending when she spends (though taxes are a bit much for her yet); and when I tell her the totals, she tells me how much change I owe her before the register gives me the answer. Eight loves animals; she recently had her pet Iguana escape; and she has often come in with stray kittens in her hands to buy them kitty food. As angelic as Eight is, she is not to be underestimated; she has often come into the store on several occasions with different adults in her life and with Fourteen so that by the end of the day, Eight is loaded down with treats. Once, she came in to buy a bag of candy, but before I could finish ringing her up, she told me that she had changed her mind and decided she was going to "save her money" and "get Daddy to buy it for her". Yes; Eight is quite the manipulator. With her smarts and people skills, she has the potential to go very far in life.I once made the mistake of referring to Seven as being six; and I was corrected that in no uncertain terms, he was "Seven!" He's a wisp of a child, small for his age; always dirty but always with a big grin on his face. He seeks the approval of adults and when he is told that such things as reporting what's in the trash can is appreciated, he will grin from ear to ear and run off. He loves to ride his bicycle and he loves to explore his surroundings.I am concerned for these children because I fear that they are not being cared for at home and that they are not living in a good situation.They live in a house that from the outside, looks to be about 3 bedrooms. Besides Dad, however, they have at least 2 other adults living with them. These children appear to have different mothers, with Seven's mother reportedly strung out on crack. Seven's approval seeking bothers me as I fear he seeks approval from other adults because he's not getting enough of that positive attention at home. They often play for hours at a time, unattended; and seeing an adult with them or watching them at play: Well, I've only seen it once. There are days when I notice these children out playing, all day, and never once encountering an adult. They live along a paved road (that's more like an ally) and cross our lot where reckless drivers have been known to speed through the lot or ally, placing these children in potential danger. Today, Seven comes to the store with untreated closed sores on the sole of his feet. These children are often barefoot; that's one thing; but they all ride their bicycles barefooted. Besides the "big" sore, he had about 6 other cuts on his feet. He came to us for help with band aids. That bothers me; why come to us? Where are the adults in his life? My coworker and I medicated, cleaned and bandaged his little foot and off he went running. These children are always wearing the same clothes; I think they have no more than 3 sets of clothing each. With the long hours of being unattended, I have wondered that if one went missing, how long would it take the adults to realize they were gone?? Some of my coworkers have worked there for well over a decade; and report to me that at least one of the adults in that house is a drug addict who cooks meth (though, it appears, not in the house) and strongly suspect that the adults are dealing in the drug trade.I feel compelled to do or say something. But we all know how bad CPS/DCF can screw up. Yes, saying something may make things better for these children; but it can make things so, so much worse for them.I am an adoptee and during the process, I have lost my sister, whom I will probably never learn her fate. This is a wound that will never heal. Each other seems to be all these children have; and I don't want to believe I am responsible for taking them away from each other. But if I say and do nothing; and they are abducted, struck by a car, miss their fullest potential in life, end up in the wrong place and time during a drug deal gone bad, suffer problems because of untreated medical concerns ... You see my conundrum.Adults have this tendency to find that they love children that they barely even know. And that is where I am. If I could, I would scoop them up and take them home to live with me. Of course, I can't do that; and of course, I know that wouldn't be the answer anyway; but emotions are emotions, you know?So I ponder: What is the extent of their risks at the home? Do those risks outweigh the risks of ending up with ineffective foster parents, losing each other or becoming adoptees themselves?