Every society and culture has its own taboos. Some taboos are based around [on] what society cannot do due to its inability based on factors such as, among many others, lack or inadequacy of necessary knowledge and skills. So, society taboos what it does not either know, understand and/or cannot do, to protect itself. It seems, therefore, that society, in some cases, ring-fences taboo around its ignorance.
Social taboos are a protective as well as defensive mechanisms, mainly of social ignorance. As it is in human society, so it is in animal society. Of course, interpreting animal society from the arrogant, know-it-all perspective of human society. Humans are arrogant know-it-all, each in their own varied ways, especially the types who play the nonsensical high moral ground games, insisting and denying they aren’t arrogant know-it-all (types).
In dog community and culture – this should be obvious to anyone who owns dogs and closely studies dog behaviour; it’s a taboo for dogs to climb up trees precisely because dogs can’t climb. Dogs have a natural inability to climb; and they seem to have and exhibit a corresponding natural fear for deep water. So, dogs have culturally tabooed their inability to climb up the trees. But this dog cultural taboo doesn’t mean or indeed, include the exception, that dogs can’t go up the tree, or be seated up on tree branches. Or indeed, can’t have preferential treatment in human society over humans. They can, but this is up to and is the discretion of their owner; master.
A dog can, indeed, go up and sit on a tree branch or have preferential treatment over humans in human society at the will and discretion of its owner; master. So, as a dog goes up and sits – with pride and sometimes misguided arrogance, barking so fiercely while perched on a tree branch, at the will and discretion of its master; so can it, and indeed, will be removed at the will and discretion of its owner; master.
Dogs have no agency over their ability to climb up and sit on a tree branch and start barking fiercely down on everything and everyone under the tree. The sight of a dog perched on a tree branch, barking fiercely on everything under the tree, calls for attention to its owner; master. In that regard, a dog perched on a tree branch barking fiercely down on everything under the tree, is serving as an information and communications agency to its owner; master.
Moral of the story: when you see or come across one such dog; it does not matter how fierce it’s barking, and do not concern yourself with its fierce barking; for it’s merely a barking dog. Rather, and crucially, concern yourself with how it got up the tree, and who perched up it a tree branch; look for and pay much attention to its owner; master.