I'd urge the reader to teach the dog and show the dog what is wanted. Then repeat. Help the dog clearly understand what's supposed to happen by some sort of simplification. Several good suggestions have been made.
Make down the shore and getting out at the bird just another day at the office.
"Coach Sanderson said to have fun."
- PSU 2017 NCAA champion wrestlers
Zain Retherford, Jason Nolf, Vincenzo Joseph, Mark Hall and Bo Nickal
"The amateur does it 'til he gets it right. But the expert does it until he can't get it wrong."
- Bill Hillmann - Decatur, IL; July 2017
"I knew exactly what to do the whole way. A lot of the handholds feel like old friends."
- Alex Honnald - After completing the June 3, 2017 first ever Free Solo Climb of Yosemite National Park's El Capitan.
Good grief nicking a pup out of the water , you got love it!
How The West was Won ( Colt) QA2
Delilahs Addicted to Mischief QA2 ( Delilah) My Jammin little girl
Working's Symphony of Addictions QA2
Addicted to the Migration ( Goose) SH (My wifes dog)
Dawsons Little Sable (Sable) 12 /08 - 5/14 , We'll hunt again someday girl.
St. Thomas, the great doctor and theologian, warns about the proper use of animals, lest they appear at the final Judgment against us: and God himself will take vengeance on all who misuse his creatures.
I do not know by what means you taught(or he learned) "de-cheating" but this maybe the origin.
You might try placing 3-4 visible piles down the shore and lining as a drill to each. The goal being teaching him that the line given tells him sometimes you get out and sometimes you swim past.
You order a Lab; ask a Golden; but negotiate with a Chesapeake!