She's 14 weeks old. I had never done this before, and was too busy to pay much attention to her when we weren't training or actively doing stuff. MY FAULT I KNOW. She is a VERY quick learner and already knows about 16 actual commands. Had her since she was 7 weeks.
It's just been a gradual thing, of her ignoring me inside the house, choosing to go play with my older dog rather than be around me, that kind of stuff.
Just started this today, and again, it's not being used as a punishment by any means. Just as an active way for me to keep a closer eye on her and reinforce her housebreaking as well as her voice commands. I am not doing leash corrections or anything like that. She's just on a leash laying by my feet or on a leash when we're around doing things. Just keeps her near me, and any active choice to come to me or look at me and ignoring my older dog (who really couldn't care less about her) is being praised generously.
I'll probably let her off leash to run in the park since she still has awesome recall there. But right now it's more just leash training, and reinforcing her needing to come when called when inside the house.
As I said. THIS IS NOT A PUNISHMENT. Just a way for me to keep a closer eye on her and reinforce things she already knows. Probably won't be very long that I'm doing this... my guess is a couple days on the short leash, a few days on the long leash, and a few more just in general, and done, and she can be off leash again.
ETA: I don't see why something has to have happened for me to do this? She's not a bad dog. Just needs a few more boundaries when inside the home right now, IT'S NOT PERMANENT, AND IT'S NOT A PUNISHMENT.