Hiya
I think your probably right about the reaction to the grass as I use Frontline combi on him.
Do you know if there is any remedy to help prevent this apart from keeping him from the park

He has short hair and looks awful..it doesn't seem to bother him most of the time but he's just got over a skin infection which was really nasty and the Vet said an allergy could have caused it. This really did drive him mad..he has had to wear a head collar for the past 3 weeks as he was scratching the affected areas so much causing it too bleed. Hasn't been a happy boy collars driving him mad:rolleyes: