overcrowding, neglect, improper pet ownership, and insufficient animal control in some areas

I agree that these are the reason for animal prevalence. Improper pet ownership is a very strong one because I see no reason why someone who is not capable should go have a pet. Before we venture into nurturing pets, it should be considered first. I love your father's kind gesture towards that lovely dog and sure your son is gradually learning this act of kindness. All these street animals from your image looks more like community security, hahaha.

Success to you!