Is eating grass normal or abnormal for your pet ??

Chipper seems to have days when he craves grass, just like sometimes he will scrape the dirt and lick some of it. He gets plenty of vitamins and vegetables in his diet; so I really don't know what it is that motivates him to eat the dirt, and it does not seem to be that he is not feeling good either.
As far as eating the grass, sometimes, he will wander around the yard , snacking a little here and there on grass and green leafy plants.
What he really likes is the fresh greens that sprout up under the bird feeder, and only when they first come up and are tender.
Many of the plants in our yards, such as dandelions and violets, are very healthy foods for people and animals; so if Chipper wants to eat those, I think it is very healthy for him.