ok he is acting 10 percent normal and healthy (he is 4 weeks old) BUT since he was only days old he has had a small cough that was irregular and not often..HOWEVER, now that he stays outside all day when he gets to running around..or right after he drinks his bottel ..he will cough about 5-6 hard coughs in a row..then it is over and he starts playing again! only about 1 time a day...he pees good, poos good, acts well....should I worry? Is coughing EVER "normal"??? Thanks