The squirrels are eating all the raspberries from the bushes .

You need to fence the area, placing hardware cloth at the base, and also underground, with a 8-10"piece bent at 45 °angle toward outside of planting area, to discourage them. Additionally, place closely spaced netting over entire top, suspended and tied firmly above the berry bushes. You can also try surrounding the perimeter with French marigolds, or similar, in hopes the scent will deter them.

I planted marigolds around my melons. So far, they’ve stayed away. Supposedly, they don’t like the smell!

You can put dog or cat hair all around the plants -- the squirrels think it's an actual dog or cat and won't come around the plant!

Try putting a few mouse traps around the plants. Bait them with peanut butter. The snap should scare the bejesus out of them and they should stay away for a while. I do this with pots the squirrels and chipmunks love to dig in and it works really well for me. Mouse traps are cheap and most people have peanut butter, so it is a pretty cheap fix if it works. I have also used it in my veggie garden when I had trouble with a chipmunk eating my sprouting bush beans, even had a hole a few feet away. The next morning the hole was ruined and neve had another bean plant chewed the rest of the season, even the ones I had to reseed!