My grandma is disrespectful and makes me feel bad about myself. How do i handle her?

My dogs and i will be staying with her for a month. If i could have it another way... i would. I'm 17 and she is going to insist on giving my dogs a dried pig ear as a treat for them. Even if i tell her no, she will anyway. If i tell her i don't want my dogs to have a hair cut.. she will anyway. She snooty and serious. and I feel SOOOOO bellow her and belittled by her. I like to feel as an equal not matter who the person is. Age shouldn't make a difference. She is rude to me. and since she does not respect me just cause of my age i have absolutely no respect for her. She acts like a child sometimes! she's overly sensitive and will get upset over ridiculous things and will turn up her nose at you. Completely ignoring me. I'm a quiet person.. thats just me. She will call me out on my personality, making me not feel good about myself at all. HOW AM I GOING TO HANDLE THIS FOR A MONTH?!?!??!