London: Jennifer Aniston and Owen Wilson had trouble while shooting alongside a four-year-old American Labrador in "Marley & Me".

The dog, named Clyde, often created havoc on the sets.

"One time he was supposed to grab some pillows, and Owen comes in wanting to grab him, and Clyde whacked him in the face with the pillow," Clyde's trainer Mathilde De Cagny told US magazine O.K.

"We also had a day when I got reprimanded. Clyde was in a scene with Owen and Jennifer, and he peed on Owen's leg," she added, reports contactmusic.com.

The movie will hit the screens Dec 25.