I completely agree with what everyone else said above..
My Tikeya I've had since she was 5 weeks old.
She is 12 now.
I have seen it all... all the bad behaviour that I've read about.. Tikeya has killed a couple small animals in her day. some include Birds mid flight, a kitten (heart attack), rabbit, among others....

She holds a grudge around dogs whome she has fought with.. Thats a major problem I had with her when she was young. She loved to fight female dogs.
And she was raised with a few other dogs, and socialised ALOT. Didnt matter, it was just her personality.
Tikeya unlike other sibes never had the urge to run away, she has separation anxiety when she is away from me, so she would never leave the yard or run away.. UNLESS she sees a cat that she would love to chase...

My sibe is VERY VERY VERY vocal, she screams when left alone, she screams when she wants inside the house, she roos when she wants out, she whines when shes bored/hungry/thirsty/ and for no reason AT ALL!!!! She is the most vocal dog anyone I know has met before. She may be an exception, but its unbelievable how noisy she can be...
I bathed her at the groomers once, and people thought we were killing her! she literally sounds like a terradactyl hahaha..

I have had the pound called on me a few times because we left her alone in the house while we went grocery shopping and Tikeya screamed THE WHOLE TIME!!!

Tikeya is a VERY picky eater, she would not take treats for training, i actually had to train her with belly rubs. She was and still is VERY stubborn when it came to training, and listening skills lol.

She pulled on a lead for many years as well, she is awesome on a leash now though.

I would reccomend you research ALOT before you allow your BF to get that sibe puppy of his dreams
There is alot of positives and negatives to the breed. But if your up to a lifetime of adventure and never like to be bored, then a sibe may be good for you guys!

They do shed like crazy as well, i can easily get two bags full of hair in 30min of brushing.