Jack Russell recently biting after 9 years

by Madeline
(New York City)

Hello, My 10 year Female 'Mya' Jack Russell bit my face. She sleeps with me everyday. In the morning when I wake up she usually gives me a hug and licks and is very lovable. Today she did the same and rolled over on her belly. As I was getting up I went and gave her a kiss on her head. I also gave her a belly kiss and she attack my face and bit me in my cheek aggressively and also on my my tumb. I told her no, she got scared and stated jumping up and down as like saying sorry...I told her no... I was very upset. I don't know why she did this to me. This is the 3rd time Mya has bitten me this way.... I now have a small scar on my check. Please help, I have children and am scared she my do the same to them. She is a very lovable dog and never use to bit until recently. I don't know why.. This behavior is breaking my heart. Thanks, Maddy