If your dog collapses, get to the vet immediately. Collapsing, weakness, and general lethargy (not greeting people at the door like usual or less interaction) are common signs of cancer, says Jake Zaidel, DVM, of Malta Animal Hospital in upstate New York. “I see this particularly in large breed dogs—even if they fall down and seem better the next day, bring them in because it could signal a tumor of the spleen,” says Dr. Zaidel. And don’t miss these 10 silent signs that mean your pooch is actually sick!
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.