If Horton had been a human boy, his teachers and parents would probably have diagnosed him as a prime candidate for Ritalin use. When hunting with the pack involves creeping up on something and lying in wait, he is easily distracted and often forgets what they were busy with. He'll get bored and start running up and down with a squeaky toy or bark at the other hunters - he probably finds silence frustrating. My neighbors do not. They like silence after 8pm, as do I.
Mr. Horton is a 7 year old puppy with goldfish memory.