Don’t even try to hide treats from your dog. His nose knows you have them. Just don’t let him get his paws on any foods dogs can’t eat. Dogs’ sense of smell is 10,000 to 100,000 times more sensitive than that of humans. Just how powerful is that? As James Walker, former director of the Sensory Research Institute at Florida State University, told PBS, “If you make the analogy to vision, what you and I can see at a third of a mile, a dog could see more than 3,000 miles away and still see as well.” These are signs that your dog is mad at you.
Coughing doesn’t automatically signal cancer; for example, small breed dogs tend to develop coughs because they have windpipe problems. “If the dog coughs once or twice, it’s of no concern, but if it continues to cough for more than a few days, that’s a concern and could signal lung cancer,” says Zaidel.
Weight loss is the number-one dog cancer symptom Dr. Zaidel says he sees. It’s often the sign of a gastrointestinal tumor. “I’ve had a lot of dogs stop eating because of gastrointestinal tumors, so they lose weight very rapidly,” he says. Cancer can also cause dogs to lose weight while maintaining their regular appetite. If you notice your dog shedding pounds, either rapidly or slowly, make an appointment with your vet. Make sure you know the surprisingly common dog dangers that lurk in your backyard!
Sores, lumps, a strange odor, bleeding, or a change in gum color can be a sign of oral cancer, particularly in older dogs. This cancer sign in dogs often goes unnoticed for too long. “We commonly find visible oral tumors because people don’t examine their pet’s mouth,” says Dr. Zaidel. “Many oral tumors can be really devastating because people don’t find them until it’s really advanced.” He also suggests brushing on a regular basis.
It’s a good idea to watch when your pet yawns or eats, advises Timothy Rocha, DVM, an oncology specialist in New York City. See a vet if you notice something out of the ordinary.
Nosebleeds are never normal, says Dr. Rocha. “With an older dog, a nosebleed is particularly worrisome. It can be a sign of cancer in the nose,” he says. “With younger dogs, I would worry more about something like a foreign object stuck up there before cancer.” (These are the 12 common foods that could be detrimental to your dog’s health!)
Diarrhea or changes in bathroom habits
Occasional diarrhea usually isn’t a sign of cancer in dogs, says Dr. Rocha, but if it persists or gets worse, get your dog to the vet. Constantly begging to go out to go to the bathroom, difficulty peeing/moving bowels, vomiting, or blood in the urine or stool are also potential dog cancer symptoms, according to PetMD.com.
Persistent discharge from the nose or eyes is cause for concern, says Dr. Zaidel. Nasal discharge is a common sign of facial tumors, and eye discharge can signal an eye tumor. (Check out these 23 facts about animals that are actually all wrong!)
Seizures can be a sign of brain tumors and are typically seen in older dog cancer patients, says Dr. Zaidel. If you start to notice sudden and uncontrolled bursts of activity, like champing and chewing, jerking of the legs, or foaming at the mouth, your dog could be experiencing seizures and you should see a vet immediately, according to WebMD.com.
“Every lump, bump, or skin change should be checked,” says Dr. Zaidel. “It could be benign or cancerous, but it’s always easier to treat the earlier it’s caught.” Feel for bumps, lumps, or swelling as you pet your pooch. If you notice something iffy, don’t delay—there’s no way to distinguish between a lump that’s benign or malignant without taking a sample. Also pay attention to any sores that won’t heal or lesions that seem itchy or painful. Also, don’t forget to keep an eye out for these dog flu symptoms.
Sudden weight gain or bloating can be a sign of cancer in dogs. If your dog is eating less but seems to be bulking up, take a trip to the vet, says Rocha. A sudden spike in appetite also warrants a visit.