Dear Dr Peter,
Rio has no other obvious symptoms. He's always a bit hyper and high energy but great fun & seems to be otherwise well. I've always had a dog but never one with this issue.
I wormed him about three weeks ago but it hasn't made a difference that I ca see. The wormer I used was Exitel Plus. Channele Pharmaceuticals. I gave him one tablet which contained 50 mg Praziquantel, 150 mg Febantel, 50 mg Pyrantel equivalent to 144 mg Pyrantel Embonate.
Thanks for this advice. I will worm again with Panacur and see how we get on over this month. I should say that Rio's problem is not intermittent. It is pretty much a constant problem.