
We have had this conversation before many many people have safely used Panacur on generations of their bitches with no ill effects.
Those who use an alternative wormer in pregnancy what are they hoping to achieve, as the bitch should have been wormed prior to mating?
The aim of pregnancy worming surely is to reduce the transfer of reactivated toxacara larva which as far as I can tell is not touched by Drontal (don't know about Milbemax).
So if your not happy worming with Panacur due to worry over safety in pregnancy why worm at all in pregnancy, especially with a wider range of chemicals, that have not been tested as safe in pregnancy (it doesn't appear in the datasheet as for use in pregnancy)?