Nov 11, 2026, 3:34 PMA UV torch is useful to investigate packages for fluorescent ink..
In areas where its safe for a cat to be outdoor or semi-outdoor, a roaming cat creates entropy of about 0,5-1 km (there are people like me who befriend random cats in the neighbourhood and photograph them but don't have cats of their own).
A dog usually has an owner, but as its walked regularly that also creates entropy..