The more I listen to Axel's chain of events, the more I'm convinced it wasn't another dog, rather, it was a coyote.

Given that I'm going to assume it was a coyote, I'm thankful he lost control of the leash, and also thankful that the pup did her job.

As to the attempts to take her temp, there are, shall we say, less invasive methods of taking a pup's temp than a thermometer shoved...

Technology has advanced, guys. The instruments may be more expensive, but they also involve no consumables, as there's no contact with a pet with an IR thermometer.