For the dog food, see Dinki-Di
Max Rockatansky first encounters Dinki-Di as a trained combat dog owned by Scabrous Scrotus, who brings him along during raids. However, after the combat dog is ordered to attack Max and fails to stop the Road Warrior, it is brutally kicked off the Landmover by Scrotus as punishment. After Max reawakens from the fight with the warlord, the dog chooses to stay with him. Moments later, he is captured by Chumbucket (who intends to eat him), but after the blackfinger is threatened by Max (and recognizes him as the "Saint" sent by the The Angel of Combustion, he frees him, cures his wounded leg and gives him the name "Dinki Di" (due to the fact that the only dog Chumbucket had ever seen was the one on the "Dinki-Di dog food" tin cans), growing very affectionate towards him.
Later, when Stank Gum attacks Chum's hideout, the dog is left behind. After Max had established a base in Jeet's stronghold, he returns back and finds Dinki-Di miraculously unscathed, bringing him back to the stronghold.
Dog proves himself also to be very useful to Max, as he is able to sniff out mines. And other things such as ammo and upgrades