My wife and I got Choco, a male Yorky, a few days ago.  It's early, but he is already showing he can be stubborn.  Trying to establish who is the pack leader in this family, but house training him is quite an ordeal.  We are trying to use a crate/litter box combo training, but it is slow going.  Any words of advice from experienced "pack leaders" here?
 
Best to all, 
James
