Some puppies often start regurgitating after solid food is instituted or during nursing. If one among four puppies is affected, congenital defects like cleft palate (improper closure in roof of the mouth) or megaoesophagus (enlarged food pipe) are suspected. Puppies who may regurgitate acutely may have ingested foreign body lodged in food pipe. Likewise inflamed airways due to aspiration of food/milk in windpipe could be a cause. Affected puppies fail to grow normally and become very weak. Please get him examined by your vet immediately before he develops complications.
Question by - Janis