Mine has had every ailment going. He's had cancer twice and still got growths everywhere, he's allergic to most foods (which is a real problem for the greedy little bugger), allergic to grass, he's had arthritis since he was a puppy and on constant steroids for a lifelong skin condition.
Love him to bits though and he's still a happy little fella even thlugh he's 11 and knackered.
How does his grass allergy manifest itself mate?