Oh what a face! He is a doll! You will find plenty of potty training tips here although not from me- I'm not very good at it.
Just keep repeating 'patience, patience, patience'. I does take quite a bit of time with most yorkies. Welcome to YT! I look forward to more pics of your little baby!
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226