1 Canker sores are small, painful ulcers on the inside of the mouth, tongue, lips, or throat. 2  Symptoms of canker sores include small, painful, crater-like ulcers.  See a doctor if canker sores are accompanied by fever, last more than three weeks, or the affected individual has difficulty swallowing.
When people think of wolves, one species usually comes to mind: the gray wolf. The gray wolf is the largest wolf and the basis of legends. According to National Geographic, the breed was almost hunted to extinction in the lower 48 states of the United States. Even now, few exist outside Alaska.
Save to mypetMD. Known as the world's largest breed, the Irish Wolfhound is a strong and sturdy giant whose temperament is gentle and noble. The Irish Wolfhound makes an excellent addition to any family that can offer plenty of space to accommodate this breed's size.