Deworming is one of the simplest ways to care for your dog, and also one of the easiest to forget. Cockers love grass, bushes and puddles, so they often pick up fleas, ticks and worms. Here's how often to treat your cocker and what to watch out for. Internal vs. external parasite control Internal (deworming) fights intestinal worms such as roundworms and tapeworms. Usually given as a tablet. External protects against fleas, ticks and, depending on the product, mosquitoes and sand flies. Comes as a spot-on, a collar or a tablet. Your dog needs both . One does not replace the other. How often: deworming General recommendations (European ESCCAP guidelines), which your vet will adapt to your dog: Puppies: from 2 weeks of age, every 2 weeks until 8 weeks, then monthly until 6 months. Adults: at least every 3 months , so 4 times a year. Monthly if your dog spends a lot of time with small children, eats things off the ground, hunts or is fed raw meat. How often: f...