Hi PeteS. Shouldn't be a problem using Fipronil too. Generally we advise leaving 2 weeks between each product just to be safe (although this would be classed as off-license). I use advocate on my own dog and if going to tick areas I have used Advantix with 2 weeks between it and Advocate, which is what Bayer, the manufacturer, recommended to us. I would seriously consider using the Serestro collar now though, which can be used alongside Advocate, as it has been shown to repel ticks. Fipronil products require the tick to bite to work (so means Borrelia etc can still be transmitted). If you don't want to leave a collar on then I would consider advantix over fipronil as there is some evidence it is a better repellant. Always worth taking an O-Tom tick remover too and a good check of him at the end of each day!

Hanneke, I'm so sorry to hear about your illness. I hope you get some semblance of normality now.