Then the way it should have gone was “Ma’am, I’m very sorry I have to do this but these are the relevant quarantine laws, and they exist because...”.
Manners and gentleness cost nothing. There was zero need for a show of force. It sucks for the deer that it had to be put down, but the SWAT raid, not the euthanization, is the issue.
Anyone who truly loves animals understands sometimes it’s a sad necessity that you have to euthanize a sick animal to prevent the deaths of many healthy ones.
Perfect.