Updated October 31, 2026. Fact-checked against veterinary sources; review by a licensed veterinarian is in progress. See our editorial policy.
Digestive symptoms shouldn’t be dismissed as normal aging. An older dog who is vomiting, having diarrhea, losing weight or becoming constipated may have a condition that deserves treatment. Some problems are relatively simple, but kidney disease, liver disease, medication side effects and intestinal illness can produce similar signs.
Why the history helps
Record when the problem began, what your dog has eaten, whether weight has changed and whether the stool or vomiting looks different. Mention new medications, especially pain medicine, because some drugs can irritate the digestive tract. If your dog has trouble chewing, oral or dental pain may affect intake without being a digestive disease at all.
Common problems in senior dogs
Chronic intestinal inflammation, pancreatic problems, kidney or liver illness, altered intestinal motility and tumors can cause digestive symptoms. Constipation may relate to pain when squatting, reduced mobility, dehydration or another medical issue. A veterinarian decides which possibilities fit after examining the dog and may recommend bloodwork, fecal testing or imaging.
Red flags that need immediate care
Repeated unproductive retching, a suddenly swollen abdomen, collapse, black tarry stool, significant bleeding or severe abdominal pain needs urgent care. Persistent vomiting, inability to keep water down, rapid weight loss or a dog who is markedly weak also warrants prompt examination. Senior dogs with other medical conditions may become dehydrated or ill sooner than expected.
What home care can help?
Feed the diet your veterinarian recommends, transition foods gradually and avoid fatty table scraps. Make water available unless instructed otherwise. Don’t give human antidiarrheals or laxatives without advice, since they may be inappropriate for some conditions. If appetite or weight is declining, ask the clinic for a nutrition plan instead of guessing at supplements.
See digestive emergency symptoms in dogs and practical stomach-upset prevention.
Veterinary references
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.