Sorry for the delayed reply.
Jessie is now officially on adult food and we are feeding him twice a day now and he's thriving on it.

He seems much fuller for longer now, his potty time is also like clockwork as well.
He has developed a taste for yoghurt too (the plain, super good for you one). Does anyone else add a little to their dogs food? Or as a treat?

He has lost a little of his puppy chunk too, and is now starting to grow into a leaner, more athletic male now. He was a little on the porky side.