Sorry, this is really TLTR (too long to read), but I got carried away...
To take your points one by one:
>>humans are supposed to be capable of reasoning whilst dogs function by an instinct for survival, not by egocentricity and narcissism.
"Supposed" being the operative word: You're making gross generalizations about dogs and humans. In fact dogs can be rather intelligent, can reason, can even be responsible, and humans can be rather stupid, unreasonable, and emotional. And dogs are capable of the same petty emotions that humans are subject to. We've all known crazy dogs, who behavior in very neurotic ways: fearful, aggressive, biting...You'd make excuses for them: "they were warped by their owners". True. And I'd make excuses for my Homo Sapiens. They're capable of being warped as well, and much more than dogs because they have more intelligence and imagination. And warped humans tie dogs to trees and don't come back. No reason you should hate them any more than you hate a dog that bites your child. Most can't help themselves.
>>Humans can choose
You seem to think this is true. Think of all the people you know who lead crazy, fucked up, uncontrolled lives: they're drunk, they get in fights, they're withdrawn, they smoke themselves to death all the while knowning they're doing it...Do they "choose" this? Who would? Mental illness is beyond "choice". It's the emotions that can't be "chosen" or controlled. The same thing mistreated dogs are subject to. There is no "choice" for such people. Sorry, but this is the dreaded Real World.
>>we have absolutely no excuse to behave otherwise
We've got plenty of excuses. Again, many people have been damaged to the point where they have no control over their behavior. This is why the whole field of psychiatry was created--a recognition of this fact. People only have free will to the extent that they have free minds--a mind cluttered with fear, trauma, or cultural crap will not behave in a rational, loving, helpful way, no matter how long you lecture it on its immorality.
>>we all have a duty to protect and nurture all forms of life.
More moralisms. Look around you to see how little we *actually* care. The Earth is dying as we speak, and we've all killed it, by being uncaring, stupid, or just lazy. You're doing your little part with your doggies, but meanwhile Climate Change will exterminate the whole planet in 100 years.
>>Have you ever bothered to observe the love and dedication of a bitch for her puppies
You ascribe human emotions to dogs. Perhaps it's just "instinct". It's like saying "have you ever observed the love of a turtle for her eggs?". I happened to believe, like you do, that it *is* love, and that dogs are high enough up on the food chain to possess it, but don't get all weepy about it. Human mothers (and fathers) usually love their offspring too (at least in the beginning). They're programmed to. Big deal. It's loving them in the long run that counts. Neither dogs or humans are especially good at that.
>>>a so-called human has not tied the un-suckled pups in a plastic bag and dumped them at the roadside?
Have you ever seen the dog 'Bad Boy' casually break the neck of a kitten. Or a cat torture a mouse...What makes you think humans are better? Simply because we're "supposed to be"? And we're the only species that tortures on a grand scale. Look at what's going on right now all over the world. Don't expect much from Homo Sapiens. This is an idealist goal, with merit, but we're far from it.
>>have you never seen a dog lick the hand that has just beaten him/her; and would you, as a reasoning human, kiss your persecutor?
Men and women do this all the time. It's called 'marriage'.
...And we have these deviant behaviors called sadism and masochism. You're letting your (puppy) love for these animals get in the way of seeing them as they truly are. "It's impossible to be in love and wise at the same time".
>>“dogsdinner” has highlighted the fact that the dog abandoned on the beach was, in addition to the markings on its collar, healthy and had been well cared for, hence the conclusion that the owner could not have been Thai!
Yes, I read that, and wasn't quite sure what she was trying to say. However 'dogsdinner' has a history of squabbles with farang men in Suan Luang, and I can't help but wonder if the dog stories are sometimes a launching platform to bash farang men, whom she seems to have little affection for. And of course I never hear dog mistreatment stories from her involving Thais, of which there are many. Of course, we farangs have a healthy reticence to criticize Thais publicly.
>>and do what YOU can to help alleviate the suffering of the numerous unwanted and abused dogs that are roaming the streets and beaches as a result of human ignorance, egoism and irresponsibility.
Well...I can tell you, *I* didn't create all these dogs, and neither did my fellow Homo Sapes. The dogs did that all by themselves. And they've left *us* with the problem: a large feral dog population, occasionally biting children, running people off the beach, spreading trash and disease, sometimes spreading a terrible disease called rabies...What would they do if humans weren't here: they'd starve and disease and kill themselves down to manageable limits. In the West, we pay assassins (called 'Dog Catchers') who simply round them all up and kill them (while giving a few away to loving homes in the process). In Thailand, the ordinary citizen is left with the problem. The dogs force this problem on us and we respond according to our resources and personalities: 1) compassionately kill them (I know one Thai guesthouse owner I've heard more than once breaking the necks of a puppy litter at dawn, and then the clunk of a shovel digging a pit), 2) control their numbers (sterilize: as Heike does) and shelter the rest, 3) kill them by neglect (because we've got too much else on our plates already besides feral dogs, thank you!), or 4) be kind while we can and then forget about the problem as soon as we leave (the tourist approach). But don't try to blame the problem on humans. We're the ones who got stuck with the problem because dogs like to fuck...
As for me personally, I'm drastically allergic to them, and have nearly died a few times in their midst. I'm not keen that the few bars where BS social life existed for me have become default animal rescue shelters, effectively ending my public social life here. Perhaps you haven't factored that fact into how much compassion I should have, but then I don't blame you (how could I?). You can't know everything about every human being, and you should keep that in mind when you talk about humans who mistreat dogs. A little Buddhist compassion and understanding for the higher forms of life as well as the lower. Anyway, I can tell you're a good person, compassionate too, but perhaps haven't lived long enough to understand the fallibilities of your own tribe.