Poopers has been on clavamox for about 11 days now for a minor URI, and around the 5th day or so there was noticeable changes, anr around the 7th or 8th day he seemed like he was basically done coughing and everything, but then it started back up about 2 days ago, his coughing started off small, and then yesterday he was going into longer ammount of time coughing, it doesnt seem to bother him like it was originally. His energy hasn't shown a decrease since starting back on his coughing. Still running arround and driving me nuts constantly. Is there a reason that the cat would go from no coughing to back to coughing in 2 days? I did not stop his treatment, still receives his dosage twice a day. But it has been a lot colder recently and a few fires not near but an 1 - 1 1/2 hours away ahve been burning pretty good, would those be more of the reason for his coughing once again, or is it probably more URI/bacterial reasons?