Vomiting can be more dangerous in senior dogs because they may already have other health issues, as well as the fact that vomiting can be severely dehydrating. If your older dog is vomiting a lot, or just more than once, or appears sick, call your veterinarian. Your vet will likely ask you a series of questions to determine how severe the vomiting is. It will be helpful for your veterinarian to know when your elderly dog started vomiting, how many times your dog has vomited, what the vomit looks like (for example, if your senior dog is throwing up undigested food, or if your dog is throwing up yellow bile) and if your dog appears uncomfortable. Call your veterinarian immediately if: There is blood in the vomit. Your dog acts like they want to vomit, but nothing is expelled. Your dog appears bloated or has a swollen abdomen. You suspect your dog may have eaten something toxic or poisonous. Your dog has a fever or is depressed. Your dog’s gums are pale or yellow. Your dog appears to be in pain. Your dog also has diarrhea. Never give your dog any medications, including over-the-counter human medications, unless advised to do so by your veterinarian.,Jump to section Is an Old Dog Throwing Up an Emergency? Why Is My Old Dog Throwing Up? Determining Why an Old Dog Is Throwing Up What To Do When an Old Dog Is Throwing Up FAQs About Senior Dog Vomiting