How did the animals explain the selections made by the terrible things?

The rabbits looked for a multitude of reason for the way the animals were selected. The explained the selections in the following way, but ultimately understood that there really wasn't a specific reason.

But the Terrible Things had brought their terrible nets, and they flung them high and caught the birds and carried them away.    The other forest creatures talked nervously among themselves.    "Those birds were always noisy," the squirrels said.    "There's more room in the trees now," the squirrels said.    "Why did the Terrible Things want the birds?" asked Little Rabbit.    "What's wrong with feathers?"

"Those squirrels were greedy," Big Rabbit said. "Always storing away things for themselves. Never sharing."

"Probably nothing," Big Rabbit said. "But the Terrible Things don't need a reason. Many creatures dislike frogs. Lumpy slimy things. And fish are so cold and unfriendly. They never talk to any of us."

"Those porcupines always were bad tempered," Big Rabbit said shakily. "Prickly, sticky things!"    This time Little Rabbit didn't ask why. By now he knew that the Terrible Things didn't need a reason.