Newbie question alert!! I planted two Kiowa blackberries in my garden and there are small berries forming right now. We have a lot of birds, finches, cardinals, robins, etc. How can I protect the berries from them?

When are the berries supposed to send up primocanes? I am in zone 7. One of the blackberries has already done so but the other one hasn't sent up anything. They are both in full sun in good garden soil. Thanks!