re: Light for tracking blood at night

Pure black lights don’t work on fresh blood at all. Scorpions, millipedes and dog piss in your house will glow like crazy, but not fresh blood.
If you have what you think is a well house broken dog and have access to a black light, take the black light and go through your house one night. Little suggestion, don’t do it when your wife is around.
You will be astounded.