Hi, I have to start brushing my cats teeth but i can't even get him to sit still for 1 minute. I have a finger brust and some special toothpaste but I don't even know how to pull back his mouth to reveal his gums and he keeps squirming. He is 1.25 years old and has yellow teeth and i've got to start brushing but he won't let me what should i do??????????? Is there special food i could give him that would clean his teeth??????