If You Were Made a Contract with a Native Dog, How Could You Still Have Dragon Breath?

The protagonist has no golden fingers and has just traveled to the world of pet beasts. The family went to the store to buy a pet beast with their hard-earned 100,000 yuan. Which one did the protagonist choose? He is a coyote who can tell at a glance that the goods are cheap but not good. It only costs 60,000 yuan at a 40% discount. Why is it cheap? Because the store clerk discovered that the wolf was dying of illness, he sold it at a discount. The protagonist also knew that there was something wrong with the pet beast, but he still bought it because it was cheap. He also comforted himself that he could travel through time, so his luck shouldn't be that bad, right? I just bought it, it shouldn't die, right? After returning home later, the wolf suddenly became able to talk. It turned out that the old man was traveling with him?