1) The challenges
regression in potty training. Also, very evident that he is an alpha male. No arguments between them, just marking and making sure the new little one knew the ropes . . . his house rules
2) Incorporation
not sure on reading or links, I just let Bogie sniff around his new environment without Woody, then let them check eachother out. Within 5 min, they were chasing eachother and playing. As much as we love our new furbabies, don't forget to give your older one a little extra attention so they know they are still important.
3) Advantages
Playmate!!!
It makes me happy having them with a playmate. We had a Retreiver when we got Woody, they loved eachother. When Mika passed away, Woody got depressed.
So I started my search and found Bogie. Woody immediately perked up!!
The other up side is with someone to play with, they get additional exercise just running around playing.