Lala, Could you do me a favour and ask Valerian (Valeriano?) which of the three antiparasitic drugs that she tried was the most effective? Or did she try all of them simultaneously? Also, did she obtain the drugs in the Czech Republic with a prescription or did she order online? If it was the latter then which online pharmacy did she use? Unfortunately, the drugs appear to be only available with a prescription in the UK (unless you buy one of the brands licensed for veterinary use, which I'm considering doing). Thanks for your help.