Build the kit, save the numbers, drive the route once — then learn the handful of responses that genuinely help and the well-meant instincts that make each situation worse.
It constricts surface blood vessels and slows heat loss. Cool water and air movement work better — and the animal goes to a vet regardless of how well it seems to recover, because the damage can develop hours later.
It may be the only thing holding the wound closed. Pad around it and stabilise it — the removal happens under veterinary control, not in your hallway.
It isn't aggression and it isn't personal. Knowing how to muzzle safely — and the situations where you must not muzzle at all — is what keeps you able to help.
Most do, and almost nobody knows which one. Finding out tonight takes ninety seconds; finding out at 2am costs you the time that mattered.