My latest stray rescue came in with asthma, he's been with me for a year, has asthma bouts about a couple times a week since he's been here...I just found him having a very bad attack and is really struggling to breath, worst attack I've seen since he's been here....I care for over 20 strays on a limited budget SO a vet is out of the question.....In 8 years of strays, I have never dealt with feline asthma before....I live close to a store, can someone tell me something I could buy off the shelf for humans that could help with "Charley's" breathing.....He's a gray tabby about 3 1/2 years old.....