I use wild cherry bark, slippery elm bark, or honey (one at a time, not all three) when my mini poodle starts coughing. The honey I just put on my finger and she licks it off and the coughing stops right away. The other 2 supplements come in capsules so I open 1 up and put half of it in her wet food (they don't taste bad) twice a day. The honey stops the cough right away and is a quick fix. I use the other 2 supplements when I think she may be having a problem and after about 3 days, she's okay. Don't know if these supplements would work for allergies but we had some very bad air quality this year and she starting coughing so I gave her 1 of the supplements and after a few days, she was fine.