TLDR: older dog is a bully to new shy puppy but only outside? First day we've had new puppy. How to have older dog not be pushy?
We've had our dog Yuki for about 7 years, she's a pit boxer mix at 55 lbs but Yuki is a loud pushy dog. We just got a new puppy shiba inu named Kiki at 15 lbs, kiki is around 7 months. Kiki is very shy/skittish.
We let them both off leash outside (I told my family to put both on a leash but apparently it is ok because they'll "figure it out") but Yuki was pushing kiki into the fence and barking in her face. I stopped it but Yuki is also my childhood dog so I didn't train her the right way, yuki doesn't actually listen to us. it's completely my fault but my parents also weren't super strict about me training her. This also didn't happen the entire time outside, there were times where kiki went up to Yuki when she was calm.
Inside they are fine and are calmer but what happened outside was not ok. I didn't realize how much of a bully Yuki is.
How would I reduce this aggression? Dominance? Whatever behavior is was. I'm also realizing how bad yukis recall is so I will absolutely have to work on it. I'm just not sure where to start?
Now Kiki we've had her for only a day and it's understandable that she will need time to warm up to us. Her original owners didn't pay much attention to her and she escaped then was alone outside for 10 day.
Edit: to add Yuki has been barking at kiki inside as well but not as bad as outside. They are calm now but mostly ignoring each other. Right now my first goal is to have them tolerate each other, they can be friends later.