I would go ahead and introduce them -- closely supervised of course -- while the other is still young. As far as socializing puppies, the sooner the better. How big is the peekapoo? And how does your friend feel about the two of them playing?
If you can get Tyson some GOOD exercise before the first meeting, and make sure that he plays nicely

I don't see any reason to postpone it. If Tyson didn't have good manners it would be another story. But if he's good now, go ahead. If you wait until the -poo is a little bigger... well, Tyson will be bigger too
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Zoë
Creek - Fawn Female, born 03/27/2001
Caney - White Female, born 03/26/2007
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