Don't let him eat before or after vigorous exercise and only let him drink a little at a time after excercising. My dog (possible part lab) will vomit and eat grass if I let him do those things. Also if his tummy seems to be bugging him, indicated by the grass eating, we give him some plain yogurt and pumpkin.

I have had several dogs that eat grass---watergrass, mainly. From what I can find, mine do this because the grass tastes sweet.

They seldom eat enough to cause the vomiting/upchucking associated with eating grass.

If your dog is continually eating enough to throw up, it is time to take a look at a couple of things. Number one, since your vet is happy with his condition, I would try a second opinion. I've found that even great vets sometimes miss things.

If the second opinion is positive, change the food. It can be causing stomach upset. Not every dog can thrive on the same food.

Thanks for the feedback. I should clarify that he eats grass on most walks if we don't catch him, but he doesn't eat enough to throw up very often...twice in the past 16 months since we got him. I'm wondering if he caught some other greens on the walk last night. One of our neighbors has a green area that we call the Salad Bar, because he so drawn to it, and it has vinca vines, etc. I don't let him go there, but he may have nipped something last night before I caught him. And he did sleep all night before upchucking.

This morning, we had several stern discussions on the walk, and every attempt at eating grass was caught. He is really good most of the time, just still has lots of puppy in him, and I'm hoping that was a rare occurrence. If it becomes a regular habit, I'll pursue a second opinion...thanks again!

Every dog I have owned has loved new grass mostly in the spring, but they always grazed on it whenever they found a patch that was attractive to them. I have always felt that there must be a need for it in their diet and would certainly never discourage it.

If your dog is eating so much that he throws up, it might be because you are discouraging it and he needs to eat quick before you notice.

I had a vision of the grass rising up and eating the dog...

Change your walking technique.

It is natural for dogs to move over distances, but it is not natural to mosey along, lollygagging and sight seeing.

A pack goes at the speed of the leader and pack members do not stop and take breaks.

When you walk him, do so with a short leash and his head beside your leg---and walk as fast as is comfortable for you. You will not be able to walk too fast for the dog to keep up. He only takes a break when you do---and if you walk for 30 minutes without a break---so does he.

That eliminates any chance for him to do anything but follow.

My Ben the border collie now 6 years old has probably eaten as much grass in his life as a Holstein Cow.. he looks like a little contented cow out their chewing on it too. He's eaten grass since he was a little thing and always has with no ill effects. Other dogs I've had occasionally would eat a little, sometimes tossing it up, but not Ben, he must have a stomach for it cause he sure likes it.

nycefarm...LOL. That would be "dog-eating grass", no? :)

handymac...I think you're right. Today's lunchtime walk was very disciplined and close to my leg on a short leash. He's normally more obedient with my DH, but DH is travelling, and the vomit inspired my inner Cesar Millan. I owned my space and he was much better. Thanks for the info...I should read more about dogs and I'd know better how to be the pack leader.

Many people want to be a dogs buddy---which is fine sometimes. But, you can be a pack leader and still show physical love---cuddling/playing/etc(those 'Buddy' things).

You just have to be a pack leader first and the buddy later.

Try feeding him a bit as soon as he gets up. Bile fills up their tummies at night when there tummies are empty, they often eat grass to get rid of the bile which can irritate the lining of theri stomachs. A small cut round of Natural Balance dog food as soon as he gets up should do the trick. Good luck PS - Kudos for getting a rescue

Hmmm, I think I remember reading somewhere that dogs eat grass if their stomach IS upset and the grass causes vomiting. It is their way of settling their stomach. Now this may be an old wive's tale but I thought I remember it coming from a fairly reliable source.

When I first got puppy Wilbur, I fretted about the grass-eating.

Now, as long as he is not eating rocks, sticks, laundry pins and other fatal things, I flow with the grass and leaves, and in fact, hope the grass and leaves distract him from the goose poop.

Just from my world.

Also: he does seem to go through "moments" when he becomes obsessed with the above things, and I find it is a great opportunity to have a training session (after "drop" and "what a good boy!!!") with basic obedience and loose leash walking. My trainers say, also, when they are "rooting" like that, for the handler to be way more interesting than the world around them, so I try to further engage Wilbur in those times, distracting him with his favorite toys. That doesn't always work, but the training sessions do.