Your two year old isnt capable of mauling someone. No matter how mean he/she is.
Not true.
Back in 2006, I was staying at my folks' house, when our neighbor's addled two-year-old (he was kept in the house watching Teletubbies 24/7, so that's why he was so mental) somehow escaped and attacked our small English Setter female, waking me up at about 7:00 in the morning with snow drifts all the way around the house.
I grabbed my newly purchased 10mm auto and went out the front door, finding the neighbor's two-year-old had our dog by the neck, with both of his front handson her chest, pulling as hard as he could, clearly attempting to tear her throat out.
I deliberately sent the first round (my reload with a 180 grain Hornady XTP) over the attacking two-year-old's back, but he didn't even flinch.
My next shot didn't miss.