As age went up, grass eating typically went down. While many adult dogs also eat grass, the commonality for puppies is a sign that it can just be them exploring their new world. Babies explore the world with their hands and mouth, puppies explore with their noses and mouths.
If your puppy has been eating grass lately then you might wonder if he/she likes eating grass. Well, first of all, know that eating grass is actually quite common and normal behavior. While diet deficiency can also cause your Dobie to eat grass, there can be other reasons as well.

Infection: Puppies might eat grass that is contaminated with bacteria, fungi, parasites, or chemicals. This could cause infections or poisoning that could affect their digestive system, skin, eyes, ears, or other organs.

You Might Like To Read. Puppies Eating Grass: Can Puppies Eat Grass? Puppies are curious creatures, and they will explore their environment including eating new things. Is it safe for puppies to eat grass?
How is Giardia spread? Dogs can become infected with Giardia upon ingestion of the parasite. They might eat something contaminated by feces (grass, sticks, etc.) or drink contaminated water (puddles).