what time-outs look like for canines

I love Maestro, I truly do. He is so much fun to play with, to take out for walks, and to snuggle with in the mornings. But recently he has been spending some of his time all on his own-

I don't know what his deal is because the behavior has never been this extreme before but I keep telling myself that if I'm consistent that he will figure it out and get a clue. Here he is sitting in the bathroom, waiting very patiently for his punishment to be over-It totally breaks my heart that I have to do this and now it seems like I'm doing it twice a day! I hope he catches on quick because I hate putting him in there. Although he sure is cute the way he sits and waits so patiently. If anyone has any suggestions as to something better and more constructive to do I am all ears!