What could cause a brown vertical line and horizontal ridges on one side of only one fingernail? Dr. Richard Zimon Dr. Zimon More info needed: Sounds like you damaged the nail bed at some point in time.
As tigers are related to cats it would mean that mean that they are feline. A canine is a dog so tigers aren't canine. 2 people found this useful.
Tigers are the most variable in size of all big cats, much more so than lions. The Bengal and Siberian subspecies are the tallest at the shoulder and thus considered the largest living felids, ranking with the extinct Caspian tiger among the biggest that ever existed.