Firefighters responded to a fire at PetSmart off Froom Ranch Way in San Luis Obispo just after 5:10 a.m. Sunday.
Fire officials say an employee of PetSmart called the department after getting to work and seeing flames. No other occupants were inside the building at the time of the fire.
The blaze was contained to one room, but the building was filled with smoke, and water from the sprinkler system.
Firefighters were able to knock down the fire within 10 minutes without injuries.
Officials with San Luis Obispo City Fire say they were no pet casualties. However, some of the store's product was damaged.
Firefighters were able to ventilate the building, but there will be significant clean up.
PetSmart employees say they're hoping to have the store open by 5 p.m. Sunday.
Officials say this could have been an electrical fire, but the fire marshal is still investigating.