Interesting, thank you.
I have not used a wormer since the Drontal, which was about 18 months ago.
I had a faeces test via the vets 12 months ago and it was fine, I have just sent one off in the post to a company called Worm count, awaiting results.
If we need a wormer I will try Milbemax has I have not seen any adverse reactions on here or or other pet forums.
thank you