I was thinking a similar scenario. Man says he was walking his dog and it got away. They go to help him look. Wasn't that how Somer got lured into that house, wanting to see a puppy?
Come to think of it my dog got out a couple of years ago and as I was walking around with his leash calling him, I had a bunch of of kids ranging from about ages 4-10 follow me to "help" me find him. I didn't know them and they maybe recognized me as a neighbor but I'd never talked to them. I didn't even ask them to help and in fact was afraid the big group of kids would scare my dog off. I was actually trying really hard to get the kids to go home but they were with me for about 20-30 minutes and several blocks. It was starting to freak me out trying to find my dog plus feeling responsible for all these kids all of a sudden. Granted I'm female and I don't think I look very threatening

Super long winded way of saying yeah, unfortunately IMO it would be pretty easy to get a couple of girls to go with someone.