Sadly it didn't work out with Charlie, I had to return him to the shelter.

He'd settled in well and improved in behaviour in almost every way, apart from one significant lingering problem. He developed a growing tendency to bite people, quite unpredictably and increasingly without offering any warning prior to the strike. It was a difficult decision to finally make, as aside from this most anti-social and hard-to-treat of dog misbehaviours he was good company, and I miss having him around the office in the day.

Jack has taken it in good spirits though. I rather get the impression that he views this as some kind of promotion.