I'm sorry you had to put Balto down but he is pain free now. It hurts to have to let them go though. Did you name him after the Movie Balto?? My daughter's favourite movie was Balto. I know that mutt dogs are great, we have had a few of them. We now have a beagle from a shelter and a rotti. Great dogs. Remember each breed has it's pros and cons. their little quirks that you have to deal with.
All the best to you!
All the best to you!