#but for social reasons perhaps? like hey uncle pakkun can you watch metal while i do important shinobi stuff

[shunshinstan]

Broke: the dog summoning contract dies with Kakashi, because he has no heirs, maybe someone signs it later on but not in any relation to Kakashi

Woke: Sakura (or Sai tbh) gets the dog contract because she's Kakashi's heir / student / mentee

Woker: Rock Lee gets the dog contract because he's Kakashi's (step?)son and therefore heir, even if he can't use chakra and actual summon them. Later on Metal Lee can actually use the contract to summon dogs.

Wokest: GAARA gets the dog contract because he's getting married to Lee and Kakashi tells him that way the dogs can reverse summon themselves using Gaara's (ex)jinchuuriki chakra and just go over to Lee and act as his.

Bespoke: SAKURA GETS A DOG! SAI GETS A DOG! LEE GETS A DOG! GAARA GETS A DOG! EVERYONE GETS A DOG!!!!