I am sorry that you were treated like this!! Your beautiful Koda looks 100% Yorkie! People do this to me and my husband anytime we take Harley anywhere because he is huge (22lbs.) and has floppy ears. He is a purebred but people are rude to us about him because they think that all Yorkies should look like the exact standard....just not how genetics always work. However, with your sweet little guy, he does look all Yorkie to me.
Those boys sound like they are bullies and were bored.
Tammy