Is not the case. Throg's origin from the first issue can be read here. As for the rest of them, Redwing is the Falcon's falcon, Lockheed is Kitty Pryde's dragon, Zabu is Ka-Zar's sabre-toothed tiger, Niels/Hairball is Speedball's cat, and Ms. Lion was originally Firestar's dog in Spider-Man and His Amazing Friends, but he belongs to Aunt May in the comics. The black dog is Bo Obama, the presidential mutt.