Yep, mostly. I used to live near the beach in Rayong, near to a cluster of seafood restaurants. Cars would draw up to the beach and throw out dogs that had been family pets, and just abandon them, thinking that people on the beach would feed them from their tables. (Same at Buddhist temples).
Obviously puppies / gifts that had grown past their 'cute' stage, and required food and exercise. Pretty heartbreaking to see the dogs try to run back to the cars as they drive off, tbh.
Anyway, well done to Soi Dog for making a difference.