We don't remember exactly how and when it started, but the retrievers have become really good at finding any pieces of plastic or other garbage they find during our daily walks.
Photo taken at 15:49:41 24.04.2019 (EET)
Canon EOS 6D
1/800 s
f/5.6
ISO 200
-2/3 EV
200 mm
Of course, anything that is found is then returned at full speed.