For 11 years, Robin Schwartz had been photographing her daughter, whom she calls her muse. But in February, Schwartz realized that her daughter had grown into a teenager — and one that no longer wanted to play dress up or serve as a portrait model. Schwartz knew it was time to work on another project, and she found that new photographic world at a party hosted by another photographer, Mary Ellen Mark. There, the photographer saw jeweled gowns created for dogs by Anthony Rubio, a designer who commands up to $600 for custom outfits for fashion-forward canines (and their owners). Mesmerized by the colorful and embellished creations, which often involve pearls, crystals or floral pieces, Schwartz knew she had discovered her new subject matter.