Bring back memories of my Australian Shepherd Tina,she would chase that ball for ever.
At the lake,I would throw the ball in and she swim to get it repeatedly.Just use your judgement,I did when I threw it in the lake because I truly believe she would have tried to retrieve it when she could no longer swim from exhaustion...
Blue healers and Australian Shepherds are very similar dogs,full of energy and always eager to play.
Dogs do not sweat and pant to cool down.Throw the ball 10-15 intervals and let Blue cool down before starting again.Have some water handy for Blue to drink.
Blue will probably wear out your arm before you wear out Blue.
Blue is one good looking friend you made!!!
TXDart