Yes, I saw this too. Too funny! I don't know if this is exactly a good idea for the dog's safety sake! Obviously the dog is nowhere close to the size of a real male lion that sports the mane but an over-zealous neighbor or passing packing pedestrian may eliminate this pet and then we will have another gun control zealot on the march.
Try to put your tree stand in a tree with plenty of background cover, keep the prevailing winds for that time of the year to your face, and take care of those pesky squeaks and creaks your stand may have developed while sitting in the shed. A good treestand lube can be made by heating petroleum jelly until it reaches a liquid form. Some hunters have reported success by including a cover scent in this mixture before applying it to their stands.