Mulberries grow on Mulberry trees. Mulberries closely resemble Raspberries. Raspberries grow on bushes. Both grow wild and are considered by some to be a nuisance for several reasons. You can tell when these wild berries are ripe when you begin to see purple bird dabs.
There are many different kinds of berries that grow on trees. Blueberries, strawberries, raspberries, etc. Berries that are poisonous to humans are also poisonous to dogs. But dogs know not to eat berries that are poisonous, unless they are like starving or something.