Why do you warn against general de-worming?

First of all it is to be noted that this is not about a fundamental rejection of chemical worming treatment. However: according to conventional medicine, worm infestation also is an illness that requires a diagnosis!
Chemical worm treatments aim at killing or purging the worms in the intestines. In order to kill endoparasites which are known to be very resistant, strong chemical toxins are needed, which naturally also burdens the dogs’ metabolism and intestinal mucus. Despite all the assurances by the industry that these poisons are not harmful for dogs, the safety indices already refute this. Generally speaking, after a successfully conducted chemical de-worming the worms are not the only organisms that have been destroyed, but also the intestinal microflora. For these reasons one should only chemically de-worm dogs when this is really necessary and subsequently, which is just as important, all possibilities for regenerating the intestinal mucus should be exhausted. (The massive improper usage of chemical worm-treatments, has led to a broad resistance, also with dog-specific parasites, which in a couple of years will automatically lead to the correct way of fighting endoparasites, owing to the complete ineffectiveness of medication, to wit by means of good immune-supporting feed and the prevention of contagion [worm infestations are infectious diseases] by means of smart hygiene.)

Regular de-worming
With most adult dogs regular de-worming is unnecessary, since only in the rarest occasions there really is a case of worm infestation. Prior to every worm treatment, one definitely should conduct a stool analysis to check for worm eggs. According to conventional medicine, worm infestation is a disease that requires a diagnosis! The infestation with fox tapeworm, which also can be transferred to humans, much more frequently finds its way to humans through forest berries tainted with excrements than via dogs. Furthermore, a good precautionary measure would be to discourage dogs eating excrements of other animals. (See below)
Natural resistance against endoparasites
Not only is the immunology well-known that a healthy immune system has sufficient defence mechanisms within the context of combating antigens, both against worms as well as against the dreaded larvae in the blood. How else could the wolf species successfully have fought its extinction, owing to endoparasites, for thousands of years?
Regarding the possibilities for regenerating the intestines and immune system e.g. by feeding measures, more can be found later at "Training of the Immune System".

By no means should this be a fundamental plea against chemical worm treatments, but merely has the purpose of warning against improper use.