Hayden Panettiere & Her Pet Pooches

Heroes firecracker Hayden Panettiere takes her two dogs — Penny Lane and Madison — for a walk around the Los Angeles on Sunday afternoon.

After walking her dogs, she slipped into a red hot bubble dress and hopped into her Porshe Cayenne. (She wore the same gold heels to Capitol Fourth.)

Hayden, 17, made her way to Nickelodeon studios in Burbank, Calif., where she auditioned for a mystery role. We hope this doesn’t mean the cheerleader’s getting the ax on Heroes!

15+ pictures inside of Hayden looking summer chic…