How long can worms last inside my dog?

Worms inside your dog can last for quite some time, especially without showing any symptoms. They can live for several weeks to months because they continue to reproduce.

Depending on the type of worm, they can last for several months or even longer. However, it is expected that you would notice some external signs of worm infestation by that point.

Worms live in the dog's intestinal tract and lay eggs that hatch, perpetuating the cycle. Unless the intestinal worms are eliminated, they will continue reproducing inside the intestinal tract.

Worms can last for as long as your dog has them, so they can be in there for years.