I am shocked that not one person on here has considered natural or alternative therapies for their beloved animal. The only thing prescription drugs do is treat symptoms, not the underlying cause. Another thing is that food should be considered medicine and Friskies for a cat is like McDonald's...
My cat Zeus is 12 and I've had him on an animal based raw diet for years switching from wet canned food (Wild calling, & Petguard) to seared (Partially raw) turkey, his favorite. After being diagnosed with asthma 1 year ago, he has hardly any symptoms anymore. . Dry kibble is the absolute worst...