My doodles had just been treated with their montly flea and tick med and did not want them to get wet while I watered the yard. Put them in the garage ..Pretty soon our came Zoey ...I thought maybe I did not latch the door well...so I closed it really tight ...Few minutes later she came bounding out again ....This time I put her in the garage and watched. Dying to get to the water sprinler she just raised up and placed her paw on the door latch and voila ....I guess 75 lbs of doodle can open a door latch...but I dont think she can unlock it .....