Freeing your dog of round worms is nearly impossible with one single treatment.
It is a myth to believe one can free his dog of round worms with one single treatment. Even the best dewormers
available at this moment can’t do the job 100 percent like it should be. To get rid of all the roundworms in your
dog, especially the dangerous Toxocara canis, more than a ‘one day treatment’ is required.
1 Herbs, glass pils and piperazine
For man and animals alike, the plant kingdom was the first medicine chest. The bark, berries, roots, leaves,
flowers and seeds of all sorts of plants were used against worms. Most of these natural remedies have only
limited activity or work only as a purgative. The great drawback of natural remedies is that they are difficult to
standardize and the activity is very variable.
In the 19th century the search for new dewormers was a matter of uncritical empiricism. A typical example was
the “glass pill”: fragments of finely crushed glass were mixed with fat or ginger to form a worming pill. The idea
was that the glass splinters would fatally wound all the worms without penetrating the mucosal layer of the
stomach and intestine. The effect of such a “splinter bomb for worms” was never critically evaluated.
In the early 20th century the dewormers available for dogs were arsenic compounds, ground male fern root,
finely chopped pumpkin seeds, fig tree sap, alkaloids, calomel and garlic in milk. All these remedies showed
fairly poor activity. Moreover, the capsules or tablets were so large or impractical that administering was a
formidable task. Usually the animals had to be fasted before treatment. For puppies in particular, the whole
procedure was so laborious that they usually remained untreated.
The accurate evaluation of anthelmintics began in the early part of the 20th century with the use of critical tests.
In these tests the nature of the infection was established by faecal examination and the experimental animals
were killed by euthanasia in