I just thought I would share this here - a warning to be vigilant if buying pet medications online. The man in this article thought he was buying the usual flea treatment for his Persian cat, but it was a fake product that nearly killed her. Analysis showed it contained an ingredient highly toxic to cats, There's a list of things to check about the packaging if buying online, but it's recommended to source through your vet to be safest.
www.bbc.co.uk/news/articles/cy9n0y34z14o