DEAR OLD TRAINER: We live in the country with several acres and a spring fed pond. Sadie, our Lab/Poodle mix, has suddenly started spending all her time at the pond hunting. She’ll come when called, but goes right back to the pond. Every day she brings us frogs, mice, moles, whatever she can find. For the first five years we had her, she stayed with us but now it’s hunting all day. What should we do?