Radix has been Isa's good buddy for over a year and yesterday for the first time in his dog life, he turned fiercely and snapped at someone. Only this someone happened to be Isa.  She has tiny little pink raised spots where his teeth grazed her cheek, but all in all she escaped what could have been a much worse dog bite experience.  And yet she feels so betrayed.  She loves Radix dearly, and could not wrap her head around why he would bite her, especially because she had just been sitting and talking with me in a relatively mellow manner (for a five-year old) and he has never been known to bite.  Anything.  She felt sad and he felt quite obviously guilty. She just kept repeating: "Bad Radix, bad Radix, bad Radix".