timmy is hacking excessively all the sudden

nothing has changed, and he still plays and stuff, but now he hacks a dry cough randomly throughout the day, at the end it almost sounds like he is gonna get somethin up, but he never does. He has always kinda hacked after water, but this is for NO reason at all...could this really mean he has kennel cough this whole time??
its kinda a worrysome cough. I never notice him doing it at nite though (kennel cough it says is common at night for coughing fits). I really wish it was easter Sun tomorrow so i could take him to vet or call and ask