I read somewhere that animals can't tell time, but I would disagree with this.
Every morning at approximately 6am, Lee asks to go out.
At 4 pm if you are home, the cats beg and beg for dinner.
At 6pm, Lee starts pacing for her dinner.
Now if only we could get Hailey to tell the day of the week and let us sleep in on a weekend/non-work day. Instead we take turns taking her out at 6 and feeding the cats before going back to bed!