You’veprobablyheardofworkingdogsthathelppoliceofficers,...
問題詳情：You’veprobablyheardofworkingdogsthathelppoliceofficers,orhorsesthathelpfarmers.Didyouknowthatcarrierpigeons(信鴿)canbetrainedtohelppeopletoo?Herearesomeexamples.MailmanCarrierpigeonscanbetrai...