My almost 4 year old yorkie, Gracie is having some mouth troubles. I have had her at the vet before because under her chin was like raw and she kept digging at it. I just assumed it was the same thing but now she shakes her head and opens her mouth like there is something in her mouth. This evening I gave her a bath and tried to pry her mouth open but she freaked out. I could look at her upper teeth but not her lower. Any suggestions? Please help!!!