Poor Harlow,, Its good that his owner was found VIA craigslist by you and so you even got good ethical behavior out of him.. I have a friend whose wife and mother done that with an APBT
he paid alot of money for .. BUT THEY GAVE IT AWAY SAID IT GOT OUT AND my buddy and I REPORTED IT STOLEN.. hahaha thats how we found out those ladies gave the dog away.. His wife has let out probably 4 dogs total 3 from me including a 28lb wombat that wouldnt hurt anyone raised with my kids but she dispises anything he likes ... pathetic..
Im really happy the owner turned up and acted accountable.. I really happy for you that your dog is not hurt.. bite would punctures are nothing to these dogs. SLices are more of a reason to loose your cool..
Dont stop walking your dog, just a get a break stick and next time let the dogs go... put the leash on the other dog CM style slip looped and CHOKE that dog out! When by yourself always control the power or the aggressor sometimes they are the same dog either way subdue the threat.. APBTs are made to roll and our actions cause them injury more than their own..
GOod LUCK! and KUDOS to contacting the owner and get it all cleared up..