There is quite a high noise-to-signal ratio in these 150+ pages. So for those seeking a summary, here is a summary of research. Here in India the dogs are like giant rats that live in misery, carry diseases, shit everywhere, and continually get into fights over territory. They are harmless to humans, but since they recently killed some baby livestock (cavies and rabbits), I decided it was time to find a "final solution". Unfortunately many Indians, seeing no problem with the slaughter of peaceful, sweet goats, nor being very offended by the Muslims' slaughter of their holy cows, treat dogs as if they are holy ("dog is god" they say), and feed them just enough rice so they stay alive. But dogs are carnivores, and due to such a malnourished diet lacking in meat, they become very prone to diseases (all of them are mangy with protruding ribs).
BTW, I am an animal lover, and love wildlife, which is one reason I dislike dogs, because they scare away the natural habitants of this ecosystem. (And killed 4 small baby livestock. With hundreds of baby birds on the way in the new incubators, these dirty mongrels must be put down, so that hundreds of birds can live. Not only birds for food, (to help eliminate the malnutrition of many humans, allowing children's brains to grow to their full potential {though I am not opposed to covert sterilization of the humans, but that's another story, and a task for the antichristians like the vaccine-mongers}, but also birds that will be released into the wild as part of a broad-spectrum campaign to restore the decimated post-apocalyptic environment here.) Another reason on dislikes dogs is because they are a perverse human creation, "as stupid as the frakking humans" with their constant barking, fighting, and territorialism. They are not natural creatures, but excessively bred (like modern wheat) to an unnatural state. There was a time in human history when dogs were humans' best companion, a time when dogs were beneficial and necessary, when we were violent tribal hunters, involved in life-and-death struggles with other predators and other warring tribes, but dogs are also expressions of all that is evil and unnatural about humans - their obsession with ownership of territory and constant combat and competition for limited resources.
First off, given the title of this thread, "need to painlessly kill", i'm surprised that no one suggested the use of opiates. Aren't there currently heroin dealers in all suburban neighbourhoods now? (thanks to the epidemic of doctors prescribing oxycodone which often leads to heroin abuse). Fentanyl would be the opiate of choice, given its potency, but may be difficult to find. However, one can easily find legal fentanyl analogs which can easily be purchased anonymously. (Try google, or check out the darkweb markets.)
For anyone who has compassion for the animal, while killing it out of necessity, an opiate should definitely be mixed into any poisonous cocktail. Not only will it prevent unnecessary suffering, it will also help depress the dogs' "immortal" immune system, allowing other poisons to work more effectively.
Together with, or in lieu of, opiates, one might also add some GHB or GBL, which may also be effective in knocking the dog unconscious, into a temporary coma, similarly eliminating suffering while depressing the canine immune system (or giving an opportunity for an easy abduction).
Unfortunately, it is due to the evils of Prohibition that effective painkillers are difficult to find, and doghunters are forced to resort to poisons that cause slow, painful deaths, like antifreeze.
(BTW, I also support the use of chloroform or ether to put livestock to sleep before butchering them, as a middle-way between the extremes of radical, often violent pacifistic veganism {just look at how the animal-rights extremists in this thread are ready to wish murder on humans}, and the extreme of cold-hearted cruelty of killing without compassion. For anyone who believes in continuity-of-consiousness (and I'll omit the scientific quantum theories of non-local consciousness), then prayers should also be said for the animal, along the lines of "thank you for offering me your flesh and your life. May I pay you back in the future {in whatever way I can, either feeding you, or helping you attain spiritual awakening}". Extremist animal-rights activists fail to reduce the suffering of animals because they take an extremist approach rather than trying to find a middle-ground, middle-way solution that the majority of natural omnivores (i.e., humans) would be willing to accept. Even cows eat bugs! And they like the taste! Pure veganism is natural only for insects and a very few niche animals, who tend to go extinct as soon as the climate changes and they lose their food source. And vegan animals tend to eat their own shit in order to meet their nutritional requirements. All primates eat insects daily.)
Back to dogs:
Next, it is odd that no one here has yet mentioned the Doghunters, a secretive, decentralized network of animal control volunteers, who help to maintain the safety on the streets by culling dangerous packs of wolf-dogs, in countries where the government fails to hire professional murderers like PETA and SPCA (frakking hypocrites), like Russia and Ukraine where the wolf-dog packs are quite dangerous and number up to 100's of 1000s.
Their poison of choice is isoniazid (300mg x 5 or 10 tabs) mixed into sausage. They call it a drug OD, rather than a poison, because it biodegrades cleanly, leaving no toxins behind to contaminate the environment. It is a medicine used to treat tuberculosis, but in dogs it causes death. They say that it first causes the dog's brain to shut down, eliminating suffering, although the dog tends to go into seizures that probably appear quite poisonous. What "they say" about may or may not be true - it's unlikely anyone has carried out proper trials. Does a crocodile feel pain when it is still twitching 2 hours after its head has been cut off?
That's my 0.02 coins. Here are some other options that one has collated from the interweb:
Fluorouracil anti-skin cancer (500mg)
acetominophen (“works well, 500mg per 20lb) ibuprofin 6000 mg
metoclopramide (is a veterinary anti-emetic, preventing the dog from vomiting out the poisons)
(suggestion: 10 tabs isoniazid + 1 tab metoclopramide)
boric acid
glass
Two tablespoons of MSG on a piece of bread will kill a dog in a matter of minutes.
methomyl (carbamate pesticide) – soak meat (aka Lannate, Mesomile, Methomex, Nudrin )
or: carbofuran , Aldicarb , - 5 minutes
oleander, hemlock, tobacco extract, etc.
ethylene glycol
Castor (or extract, but be careful not to kill yourself with ricin)
fluoroacetate (pesticide) This drug is a colorless, odorless, tasteless, water-soluble chemical that is highly toxic to all mammals, most particularly dogs which are more susceptible than most other animals, with lethality occurring after consumption of less than 0.1 mg/kg
Blowdarts + dart frog poison / blowfish poison / ?cyanide, etc
Sponge?
Ether/chloroform - dogs' noses are too sensitive and they will resist coming near the smell, but if a doghunter can succeed in putting the dog to sleep with xanax / opiates / GBL or GHB, then some ether and a plastic bag will complete the task and the death will be peaceful and painless. Ether is quite volatile and will likely evaporate before any autopsy is conducted. One might soak a thick fabric bag in one of these etherous liquids, and tie it over the dog's head (after having gained its trust), so it cannot escape inhalation of the gas. This will be easier in colder weather, since these gases tend to evaporate quite quickly (boiling points of 35-40 degrees C or so).
I do not condone any of these actions, but if one must eliminate a pest, I would suggest using the above methods to reduce unnecessary suffering for the dogs and unnecessary karmas for the actor. Atheists and materialists, please replace the word "karma" with "heavy heart / conscience" or "developing predispositions towards cold-heartedness". Life and death is a cycle, and every second of our metabolism kills millions of microbes, but when engaging in any action, it is the motivation that determines the long-term effects on the actor's psychology, and perceptual habits.
(Materialists: Try killing 100 dogs in one day, and then dosing heavily on LSD and then tell me if you still disbelieve in karmic cause-and-effect. Compassion for the victim along with prayers offered, will reduce the negative heavy-heartedness, and help create positive energy. In the long run, it may even be a blessing for an animal to offer its flesh to a good-hearted human, for one day the debt will be repaid. One day, the killer may find hi/rself as an untrained dog.. would you rather be killed painlessly or by a slow, painful death? In the end, the Law of Balance always prevails, so do unto others.... But this is not the place to discuss the philosophy of the true nature of consciousness, not a mere epiphenomenon of matter but a fundamental quality of the zero-point field, or of Balance, Illusion, etc.)
Yeah, like burning my foot shortly after leaving out some MSG + peanut butter balls (we'll see tomorrow, it seems I couldn't wait for the synthetic opiates to arrive), or having dreams of bloody butcherings after leaving ratpoisoned food in the trashbin that the stupid dog keeps making a mess out of (didn't work) in the end everything gets equalized.
"And the dog came back, the very next day, oh
the dog came back, he just wouldn't stay awaaaayyyy... " (original tune is "cat" but i forgot all the other lines)