her has sad eyes

I had my nieces and nephew over tonight while their parents went out to dinner to celebrate my sister's birthday.  Bjorn informed about an hour after eating dinner that " I still hungie, Auntie."  So I informed him that there were a few pizza slices left he could eat.  He promptly went and helped himself.  A few minutes later I noticed Nadia (my dog) eating the crust of a pizza.  So I asked Bjorn, "Did you give Nadia pizza?"  He said, "Yea, I gave her pizza that I not eat. I'm gonna give her more pizza that I not eating."  I told him, "No!  You can't give her anymore to eat, she's had enough."  He replied, "But Auntie, her has sad eyes" and he promptly handed her the crust that he hadn't eaten.