thats a good question as my newfie is intent on eating the lawn,not just the grass but the mud as well, i do stop him though,be interesting to find out the answer jo
My 4 year old mally bitch sometimes eats grass (not moss though) all day long refusing all foods. I have added a teaspoon of Active Manuka honey to her diet twice daily and she hasn't touched grass since - been three weeks now - I was worried she had a stomach ulcer, from what i'd read on the net.