The time for dogs to travel from Xuzhou to Yunnan varies due to many factors, including the mode of transportation, travel route, traffic conditions and the physical condition of dogs. The following are some common modes of transportation and corresponding time frames for your reference:

1. Plane: If you choose a plane as a means of transportation, the direct flight from Xuzhou to Yunnan will take about 2-3 hours. But what needs to be considered is whether the dog meets the airline's consignment requirements, as well as the relevant procedures and health checks that need to be handled.

2. Train: Train is a more economical mode of transportation, but it takes a long time. It may take 20-30 hours by train from Xuzhou to Yunnan. You also need to consider the transportation arrangements and related procedures for dogs.

3. Car: You can choose your own itinerary and stay time, and you can drive by car or private car. According to the geographical distance and traffic conditions, it takes about 30-40 hours to get from Xuzhou to Yunnan, but the specific time still depends on the actual situation.