Have only just seen this thread.
Yes, I had a cat with hayfever: Samantha. She lived a good long life but was troubled by allergies. She was allergic to fleas, one bite would bring her out in big welts; I couldn't burn incense when she was in the room otherwise her breathing went a bit asthmatic (which could be brought back into rhythm by making her purr and relax); and every spring/summer she would sneeze frequently.
I sometimes wondered if she had a grass seed lodged up her nose, but it happened every year. She would have a clear trickle from her nose and eyes too, but nothing major and it didn't seem to bother her. I didn't take her to the vet specifically for that problem, though he did keep and eye on it if she had to go for something else.
It only happened intermittently, not all summer, and didn't seem to distress her, just be a bit of an annoyance.
I prefered not to medicate her for this.
She lived to be 19 and died from severe renal failure a year after her close friend Polly had died.
