Ticks, fleas and ear mites. These are nasty things for you and your dog. Not only because they itch
and irritate but they are a threat for health aswell. Some diseases caused by them can be cured but
some are better to be prevented.
Inform your vet, he can advise you and tell you about the standards in
your country.
Prevention is better than cure (as far as a cure is possible).An infection by worms might
damage your dog's health. And as if that isn't enough roundworm can also infect humans. Therefore it is
useful to give your dog an anti worm treatment regularly. Use a broad working treatment.

The roundworm is the most common worm species. Young dogs are usually carriers
infected in the uterus or by mother's milk. Adult dogs are also regular carriers.
Infections by sniffing the ground, faeces etc. can hardly be prevented. Symptoms
are diarrhoea, constipation, dull coat and bad condition. Symptoms with pups are
diarrhoea, vomiting, swollen belly, and becoming thinner. In addition, the
tapeworm is an often-occurring species. Injection takes place by fleas and
is harmless. Symptoms can be so-called 'rice grains' near the anus and the
dogs slide his butt along the ground. A treatment only effects when fleas
are being exterminate at the same time.
Ask your vet for a worming agent and other prevention.