What is a common sign of roundworm infection in puppies?

A common sign of roundworm infection in puppies is a bloated abdomen or potbellied appearance. This characteristic physical symptom occurs because roundworms can grow quite large and inhabit the intestines, leading to a buildup of gas and fluid. This, combined with the worms consuming nutrients from the host, creates the characteristic distended belly. The potbellied appearance is often visible alongside other signs such as lethargy and sometimes a decrease in body condition.

While weight loss, excessive urination, and loss of appetite can be associated with various health issues in puppies, they are not as specific to roundworm infections as the potbellied appearance. Infected puppies may still have a normal or even increased appetite due to the worms stealing nutrients, which can sometimes mask the actual condition of the puppy. Thus, the potbellied look is a key indicator that can help differentiate roundworm infections from other potential health concerns.