Picking up Habits/Behaviors from other Dogs?

[Konotashi]

I was kind of curious how much other dogs in the household help shape and mold a puppy's behavior and habits.

Ozzy is a ball nut. I'm kind of wondering if that's because I took him out with Sania all the time to play fetch when he was a pup. Pomeranians aren't usually ball driven, especially as much as Ozzy is. He'd rather be trained with the ball as his reward, than treats.

I'd like to think that whenever I get my GSD, he'll show him that other dogs ROCK and people are pretty awesome too. I wouldn't want an over-the-top friendly GSD (like Ozzy - he thinks all living creatures are engineered to love him), but I'd rather have a too-friendly GSD than a too-unfriendly GSD.

Thoughts? Opinions? Experiences?

[onyx'girl]

I don't know how much influence an older dog has to mold or shape a pup, if any.
Onyx is/was fear aggressive /reactive/anxious in her personality. Karlo has been around her for almost 3 years and shows NONE of those behaviors.
I think dogs may become more playful having others around to influence them, they may become barkers if they live with a dog that barks at anything.
Onyx and Kacie will not tug with people, Karlo loves to tug. As much fun as we have~while they watch, they won't be influenced to try it.
Genetics are the biggest influence in temperament, even though many think environment, nurture & nature is .

[kiya]

I definitely think a pup might imitate the older dog, maybe not all the time but sometimes. I feel that Lakota learned resource guarding from Apache. He wasn't nice to her when she was a pup, always snarling at her if she came too close to a toy. Now I really have to watch them. When it's time to go out at night Apache gets all excited, he starts playing ruff and barking. Now all of a sudden Lakota started getting excited and she does a zoomie & barks when I get ready to let them out.
She has a totally different relationship with Kiya, they are bff's without a doubt. They play so nice together, which is good for Kiya because she doesn't always want to play.