Forum threads on this site have generally stated that it is very rare that an LEO will fire their weapon in their career. Who is killing 25-500 dogs per day? ( DOJ statistics)
Using the lowest number of 25 dogs = ~10,000 per year.
The 500 came from here:
“We are nowhere close to having complete dog killing records for all 18,000 police departments,” Wieder told the Daily Dot. Puppycide DB looked at the dog-killing records of just 40 police departments. The data showed a mean killing rate of 10 dogs per department. Based on just that tiny sample, Wieder said, that rate would add up to 500 dogs a day nationwide
The calculation used the lower end of the DOJ estimate. I will make a correction to fully reflect the facts.