has anyone used the prazimec -d wormers , my pal has just brought a small quantity back from working overseas , I used them on my dogs at the weekend and have done the trick,, I have just googled them and they do a wide range of worms ,fleas, mite,lice, mange mite ,ear mite , but not suitable for collie breeds ,,1 tablet does 10kg body weight, hes asking £10 for four tablets + £1 p&p if anyone is interested drop me a pm .