Worms (intestinal parasites) occur the whole year round. Once off deworming may not be enough to prevent re-infestation. Worm eggs are small, they can be blown around, they occur on grass lawns and they hatch every 3 weeks, depending on the time of year and the type of worm. It is therefore advisable that puppies and kittens should be dewormed every month and adult pets should be dewormed 3-4 times a year.
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