Making an extract out of green material will increase the CBd while the thc is pretty low.... I know you aren't making it but maybe you could find an extract made from green. I would give 2-3 times a day, don't be alarmed if he sleeps a lot at first. He will form somewhat of a tolerance. My cat likes me to rub a little infused budder or coconut oil on his fur and he titrates himself- good luck!!