Hi Guys!
It's definitely been a while - lots going on, and probably wont have time to hang around here as much as I used to, but..
Earlier this year my hubby and I bought our first house (YAY!) It's a lovely detached, fenced yard, plenty big enough for us to grow into. So since we weren't renting anymore, I'm still advancing in my career, so no kids yet... so what did we do? Got another puppy 
Tobias is 9 weeks old as of 2 days ago. He's another mutt, his pregnant mother was a rescue - but she looked about 1/2 border collie. He's a cute, smart, black ball of fuzz.
Sierra's turning 10 in November. She's still got a lot of spunk, zero health issues, begs for her walks, zoomies in the yard, etc. But she's always been iffy with other dogs since she is quite dominant and plays rough and tends to start fights.
The good news is - the two, as of yesterday, are playing fabulously together! 
It's mostly wrestle-type play, which is what Sierra prefers. He was a bit intimidated at first but now they're just fine. But here's my worry - he's following a LOT of Sierra's behaviours, in general. I'm worried that he'll pick up the habits that has gotten Sierra in trouble for her entire life. She is also a very hardy dog with a high pain tolerance. I know she won't tell him when he's being too rough. I don't want to discourage the play though, since this is essentially what i was hoping would happen if we added another dog. Now that they've discovered how fun it is to play with one another, they're playing for hours and tiring each other out.
Thoughts?
I'm thinking of doing a puppy class after his next set of shots, even though my hubby thinks we can figure this out on our own. It's been tough dealing with Sierra for the last 10 years and i want to make sure this one grows up without those issues.