I usually send off poo samples to have them screened for worms and lungworm, but delivery is still iffy at the moment and I don't want the sample to be sitting in a sorting office for a few days So I think I need to use a chemical wormer He's had both Drontal and Panacur in the past, and has thrown up after - not every time, but there's usually some sign of a disturbed digestion. Could anyone recommend anything more gentle, please? Does it make a difference if he has them with food? I can't remember what the instructions were when I used them. Could giving separate treatments for each type of parasite at different times help him tolerate them?