I've had a splint on my hound a few times for a dislocated toe. He had pressure sores within 2 days, so I always removed it. So, I'm not a fan of them and they are stupidly expensive. I work at a veterinary supply co. and the $5 splint ends up costing you $80 to $100. Also, the tippy toe walking is not great for the spine.
Hope your pup has a easy recovery.