I'm hearing these stories a little too often lately and it's making me so very nervous when i take Pixie out on the lead, she's only 6 months and not much over 2 lbs. My last yorkie was on the receiving end of larger dogs a few times and it has made me so cautious now.
My heart goes out to you, this should never have been allowed to happen.
I hope in time your heart will heal...your baby knew how much he was loved. x