What about the dogs surprised the judge?

a. He was surprised that they had so much energy, because they were so little

b. He was surprised they didn't fight with each other. He said most male/female pairs had ongoing battles while hunting.

c. He was surprised that the dogs were able to find the scent when the coon had gone so far out on the river bottoms.

d. He was surprised that they seemed to understand so much of what Billy said to them.