We got a second dog almost a month after the first (both shelter dogs) and they get along fantastically. They were best friends almost immediately. Both are Siberian Huskies; the first is a 1 1/2 year old male and the second a 3 year old female. She's definitely the alpha--he is very passive with other dogs--and we had almost no problems until this last week.
He started being a bit weird about going off of the back porch and into the yard about a week ago (we've had her for almost a month now). He'd do his business right at the edge of the porch and then run back in, or not go outside at all until he really needed to go. But starting last night, he flat out refused to go into the grassy part of the back yard. I tried taking him out without her, with her, and on a leash, but the only way to get him to go into the grass is to carry him there...and then he immediately rushes for the porch.
Now he refuses to go out the back door at all. I took him out front to pee this morning, but he pooped in the house shortly afterwards. He's very housebroken--this was his first accident inside since we got him. The female, on the other hand, had several inside before we got her trained.
I'm at a loss. I've had dogs for my entire life, and Siberian Huskies for years, but I've never encountered anything like this. He's been a lot more quiet lately, too--she just wants to play with him but he's very off. He doesn't seem sick (we just got a clean bill of health from the vet after a bacterial infection he picked up at the shelter), so I have no idea what to do. He used to love the backyard and run around in it all the time, but now he's afraid to go outside.