I try to avoid pesticides as much as possible, but every now and then I use them as well, and I try to find something that’s not too harmful. But as a parasitologist I know what a big the problem resistance to antiparasitics is. I believe it is very important to know exactly what you are fighting to be able to choose the best remedy, and to use the right dosage. If you under-dose, you may kill most of the parasites, but there is a risk of letting the more resistant ones survive, and after a few times with such practice, you may end up with a resistant strain, it doesn’t take very long.