Diesel is 5 1/2 months old, and only lifts his leg when he's out on leash with Pedro or Gracie, watching them. Yes, Gracie is a female, but she lifts her leg to pee. I suppose she learned by watching Pedro.
If I take Diesel out alone (as I often do, since he has to go more often than the other two older dogs) he doesn't even attempt to lift his leg.
I'm excited, though. He's started going to the door and letting us know when he has to go out!
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