If your dog can't go to the bathroom properly, it can be quite uncomfortable for them and concerning for their owners. Inability to pass feces, or pain associated with passing feces is considered a veterinary medical emergency and requires immediate care. If it’s been more than two days since he has had a bowel movement, you should see your vet immediately. If your dog’s constipation goes untreated, he may eventually be unable to empty his colon on his own, causing lethargy, unproductive straining, loss of appetite and potentially vomiting. Also, if your pooch’s bowel movements are infrequent, difficult or absent, he is suffering from one of the most common health problems seen in pets’ digestive systems - constipation. Signs of constipation include straining, crying or crouching when attempting to defecate. Elderly pets are more commonly seen suffering from constipation, however, any dog that faces one or more scenarios that contribute to constipation can suffer from it. What causes constipation in dogs may be many factors, including lack of exercise, excessive or insufficient fiber in his diet, other illness leading to dehydration, and more.