Well, before getting my first Yorkie, I read TONS of YT members' posts. Specifically the health/sick/injured posts. I got a good scare learning about all the weaknesses about Yorkies, but felt well prepared when I first brought Scottie home.
I don't let strangers hold my babies to this day (for the exact same reason as what happened to your Louie). Some people may think I'm uptight, but I just cannot fathom the thought of him breaking his leg, neck, back from being dropped. When I first let my family hold him, I made them sit on the floor. And also made sure Scottie was comfortable and not scared. It was a very slow transition. But well worth it. He now loves all my family, which is great for when I need a dog sitter.