My last experience with asthma was after I ate a bowl of ice cream, I hadn't had an attack in years and ended up watching the sun come up because of it, I found that dairy was a huge offender for me when it comes to allergies, I cannot consume it. I also found that when I cut all dairy out of my diet any allery symptoms I may have been experiencing was lessened considerably. I also found that corn and any corn products did the same thing.
I have the exact issue; dairy and corn really make my breathing difficult. I have turned to nondairy substitutes like almond milk and I'm doing much better!