the snake river!!

We take oliver to the beach every time we go(which is pretty much every weekend). Since we live not too far away from the snake. We go out in our boat for about 30 minuetes and then were at a pretty good beach. There are a TON of hackberry trees. Has anyone had any problems with your doodle eating the berries? Oliver hasnt eaten them yet, but how do we deal with it when he does?

Thanks!