My baby girl Jazz has been coughing/trying to get up a hairball for the past 2 weeks. I have increased her hairball medicine as per the vets instructions but she still coughs like she has a hairball. My question is could she have a cold or is this a hairball? No smoking allowed in my house and her eating and litter box habits have not changed. Also, I noticed she coughs more when the a/c is off.