I’d agree with you in relation to those kids but in general I think it’s fine. I walked my dog every day after school from 12 onwards and always kept away from other dogs while I was alone because of what you’ve said. But I was also more mature for my age than Isabellei dunno, i’d be calling her irresponsible if she let the girls walk the dog without an adult present. maybe it’s just me but if a dog got into a scrap with another a child would have no hope breaking it up