According to the ASPCA --
The majority of pets are obtained from acquaintances and family members. 28% of dogs are purchased from breeders, and 29% of cats and dogs are adopted from shelters and rescues.
Therefore, 70% of animals living in homes are NOT adopted from shelters. Potential adopters considering adopting a "special needs" animal account for an infinitesimal minority of folks who walk through the shelters' doors. Obviously, Alejandro and Doug saw that Pony is indeed special. And shelters need more adopters like Alejandro and Doug.