3 ms·
One of the sources also mentions tracking dogs, so it seems to have been quite multi-purpose!
by htfu 6y ago
One of the sources also mentions tracking dogs, so it seems to have been quite multi-purpose!
- mattkrause 6y ago[6] says that "Spy Dust" was a catch-all term for compounds used this way, rather than just NPPD.
- sandworm101 6y agoReminds me of sheep. Ever notice sheep with a colored mark on their back? They hang a bag of colored chalk under the ram. This then leaves a colored mark on the back of the sheep he has serviced.
- pacaro 6y agoAlso known as raddle not every Ram or Tup will tolerate a harness, so sometimes powdered raddle is mixed with vegetable oil and smeared over his chest. It gives the farmer quite a lot of information, by changing the color every 17 days (a ewe's cycle), they can detect a infertile tup, predict lambing dates, etc.
- floren 6y agoIn modern dairy operations, you chalk the tail of the heifers/cows you want bred. When the animal comes into heat, other female cattle will mount her and rub off the chalk. The artificial insemination tech then knows who should get inseminated.