Hello and welcome to Yorkie talk!
sounds like your little guy is having a lot of challenges
but honestly, I think that seeking out help for them is often how folks find themselves here! There is plenty of good advice and support to be found. Here is a link from the training forum that addresses many issues as well as potty training:
http://www.yorkietalk.com/forums/gen...info-pics.html
We have a lot of success using the indoor potty pad method for our little girl- for our family, I really can't imagine it any other way! Also with the wind and the rain and how tiny she is...for us indoor potty pads (like a litter box for cats) had been a great way to go- she gets to be successful and we don't have the mess! Way less stress. We also have alway employed the use of baby gates, closed doors and exercise pens to support our potty training efforts. Yorkies are known to take longer than others.
There are some great ideas for introducing careful socialization to support your baby too, it sounds like he may be struggling in that area (mailman). I would really reccomend a doghouse in an expen to create a safe space for your buddy, especially if you have kids in the house. I have several young children in my household and it really changed the way we introduced Lilah- two story dog house in an excercise pen, baby gates and a slow roll helped us start out. Yorkies are a very boisterous breed as a general rule and can 'hang with the big dogs' better than a lot of little guys but a safe space to go to can really create a platform of security to build skills on top of.
I hope you find and use some of the great resources here
good luck with your special little guy
