my pot belly pig has a cough he isnt very old about 2-3 months old and he is a house pet hes had the cough about 2 weeks its a dry cough his appite is stronger than ever loves to eat playful seems like nothing is wrong but his cough is scary sounds like hes coughing up a hair ball. is this something i need to be concerned about and get him straight in to see the vet or is this a common cough?