What do you do when your poodle keeps gagging and purging thick white foam?

When a dog has rabies they FOAM FROM THE MOUTH, not vomit! Your dog may be on a diet it's digestive system can't handle or, there could be a problem in the digestive system. Many dogs (like cats) will eat grass when they aren't feeling well and will vomit either yellow acidic or white foam. In this case it's best to let your vet take a look at your pet to be sure it doesn't have a twisted bowel or some other digestive problems.

Good luck!