Like it on Facebook, Tweet it or share this question on other bookmarking websites.
Hello, I'm jacoby. This sounds like it could be acid reflux. Some symptoms are throwing up food, which looks like saliva because it's been partially digested. Another symptom is the appearance of pain when swallowing. They also have a low appetite and decreased activity. This is often cured by feeding your dog low fat, low protein meals. Take him to your local vets. If this is the problem, they will help you set up a good dietary plan for your dog. Any questions just ask. Thanks.