Lucianna_Todd
Вот цитата:
"All right to put its muzzle on, chief?" asked Mr. Powell. "Only this one, seven-three-two, 's been known to be a right sod at times and it might come round enough to start in on me--sudden-like, you know."

"Yes, there's no objection to that," replied Dr. Boycott, picking up the stop-watch.

"And the time, chief?" enquired Mr. Powell in a rather sycophantic tone, as though the time were likely to be something to Dr. Boycott's personal credit.
Так что в лаборатории у псов были номера, а не клички. Конкретно у Рафа - 732.