Dog Struggling with This Whole "Bark" Thing

Occurred on April 2, 2018 / Columbus, Ohio, USA

Info from Licensor: "Bolt (Superbolt) is a service dog in training for an organization that trains service dogs for children and veterans with disabilities called 4 Paws for Ability (https://4pawsforability.org/). For many of their alerting tasks, barking at the right time is crucial. My boyfriend and I are both trainers - he actually trains Bolt's sister, Pria - but neither of us have ever trained a dog with such hilarious attempts at barking as Bolt. They are both a few months older, around 9 months old now, but he continues to need a few tries at 'barking' as displayed in the video before he gets a full bark out."