Many people advocate euthanasia as a method of control. Thailand is a Buddhist country and euthanasia is not acceptable to Buddhist beliefs. Perversely many areas control dogs by poisoning, drowning at sea and other inhumane methods. Unwanted puppies and kittens are often put in boxes and plastic bags and placed on busy main roads. The logic behind this is that the animal chooses to eat the poison, the puppy or kitten is killed by a car, and drowning in the sea is a natural form of death.
Soi Dog's vets will euthanize a cat or dog but only if that animal is suffering and has no hope of recovery.
Killing animals or rounding them up and placing them in dog pounds has no effect whatsoever on the overall population, as the fertile remainder will always rapidly breed to fill the void.
It has been scientifically proven that spaying & neutering 75% to 80% of a population of a species will see a reduction in numbers. The number of stray animals on Phuket is now reducing despite the rapidly increasing human population, but with more unsterilized animals being brought onto the island by pet traders and migrant workers there is a real danger that this trend could reverse. The situation in Bangkok is not under control & will require a massive effort by groups like Soi Dog & the Thai government.
It is imperative that we continue this program, but sterilizing animals is expensive and we are limited by the revenue we generate. Vets and dog catchers have to be paid and drugs and other surgical supplies purchased. Overheads like fuel and trucks also have to be paid for.
By demonstrating that humane spaying & neutering works we can set an example to the rest of the Asian region, where in many countries inhumane and primitive methods of population control are used to this day.