Hilary Duff & Haylie: Dog Day Afternoon

Hilary Duff and her big sis, Haylie, take their dogs for a walk on Thursday (April 7) in Los Angeles.

The 23-year-old actress and her 26-year-old sis both stayed hydrated with water bottles during their walk with the pups.

“My dog Birdie and I are best friends… we even get allergy attacks together,” Haylie tweeted earlier in the morning.

Over the weekend, Hil was spotted visiting a friend in Toluca Lake!