I have a seven year old. And it seems he spent most of his previous school year coughing all the time. It seemed to start every time he ate something and the cough seemed to continue. So the doctor gave him Rantidine. Before all that we gave him Zyrtec....we have been giving him Zyrtec since he was a toddler, but he always has this cough. Well he hasn't taken the rantidine or zyrtec over the summer and we just got a dog. A Cairn Terrier and of course he is all over the dog. So now I don't know if the dog has caused the coughing, allergy season or its because he needs the rantidine again. What do you suggest.