Spider sense is a lifesaver when navigating the poop minefield that is your dog park.
No one's having kids anymore. They are having dogs. And fewer of these dog-havers are just letting their animals defecate on newspapers and bark all day in a stifling studio apartment. Those dogs need someone to take them out several times a day to defecate on and bark at the world at large. This isn't too hard to break into in urban areas. Put up a few tabbed fliers in the local pet food stores, get a couple referrals, and a superhero's got himself a dog-walking empire. Being out and about on the city sidewalks all day still affords plenty of photo opportunities.
This canine crusader just needs to ensure that none of his dog charges gets mixed up in battles. The second a Shih Tzu gets crushed by one of Doctor Octopus' mechanical claws, word will get around fast, and those dog-walking phone calls can dry up as quickly as they started coming in.
It was leaving him with the baby or risking him biting Mysterio again and having the city put him down.