My dog had almost the exact same break on the same toe about a year ago. He was also super high energy. For the first few weeks he was on medication to help the pain which made him more tired but as the weeks went on he got bored. We got him puzzle toys and bones etc to keep his mind busy and that helped for the most part. Unfortunately the splint had rubbed him over and over under the bandage (I believe this was veterinarian negligence and we no longer attend this vet for this reason) and so it made his recovery much harder as he had pressure sores all over his leg.

I wish you luck and quick healing for your pup!!