I know a lady give her pits their first shot at 5wks. She says that pits are prone to parvo, don't know not my breed. I have mini aussies, and give my first dhpp shot at 8 wks. It is then up to the buyer to continue according to their vet. Hope that helps.
Not knowing how old they are or if they have had any vaccines up to now.......
Shots are startd at anywhere from 6-8 weeks depending on the breeder, they are then repeated every 3-4 weeks for 3 total shots. They then are done until their one year old booster, and after that by the vets recomendations. Some continue to do them annually, some are on the more recent studies and booster every 3 years until a certain age then stop.
Check with your vet for details on his preferences.
People are like slinky's, not really good for much. But its still fun to push them down the stairs.