:::groan::: :::giggle::: :::ROFLMAO:::
I opened this expecting to express sympathy for the loss of someone's pet duck. You got me, and it was a good one!
The thing is, some dogs can detect things like cancer and high blood sugar levels (for diabetics). Having them sniff is a lot less costly and invasive than the usualt testing. Sorry, I know I'm off on a tangent here.