The most common problem with pets are the worms and parasites. Luckily, there are several different worming medicines that are efficient against worms. The most efficient ones are worming tablets for dogs. Some of the symptoms for having dog worms are: visible eggs or worms in you dog's vomit or feces, weakness or weight loss or constant scratching.
Source: https://www.thevetshed.com.au/dogs/healthcare/worm-treatment/
