【Answer】Solution: Assume that the third place is Gray Wolf, then everyone else is telling the truth.
That is, Nuan Yangyang is faster than Gray Wolf, the second place is faster than Nuan Yangyang, and Gray Wolf is the third place, at this point Nuan Yangyang is between the second and third place, which is a contradiction.

Similarly, if we assume Gray Wolf is the fifth place, according to the statements, it is also a contradiction.
Therefore, Gray Wolf must be the fourth place. Everyone else is telling the truth, so we have: Xi Yangyang is faster than Sai Yangyang, the second place is faster than Nuan Yangyang, the third place is faster than Gray Wolf, Bo Yangyang is faster than Xi Yangyang, Nuan Yangyang is faster than Tai Lang. Therefore, Bo Yangyang is the first place, Xi Yangyang is the second place, Nuan Yangyang is the third place, and Lazy Yangyang is the fifth place. Hence, the answer is: second.
10. (12 points) In the Sheep Sheep Sports Meet, Happy Sheep, Boiling Sheep, Lazy Sheep, Warm Sheep, and Big Bad Wolf participated in a 400-meter race. After the race, the five of them discussed the results.
First place said: “Happy Sheep ran faster than Lazy Sheep.”
Second place said: “I ran faster than Warm Sheep.”
Third place said: “I ran faster than Big Bad Wolf.”
Fourth place said: “Happy Sheep ran faster than Boiling Sheep.”
Fifth place said: “Warm Sheep ran faster than Big Bad Wolf.”
If only Big Bad Wolf lied among the five, then Happy Sheep got the $\qquad$th place.