Don't recall ever having squirrels raid my strawberry patch. My guess is raccoon or oppossum. Mocking Birds or Cardinals are a big problem for me but they never take the whole strawberry.

Could you put a wire cage around the strawberry planter?

I have actually had a squirrel walk defiantly in front of me with a big red strawberry in his mouth. I grow the ever bearing type and have yet to taste one. So squirrels certainly can be a problem.

I also have had critters eating my cherry tomatoes and gnawing at my zucchini. To combat this, I placed mousetraps near the plants. To keep them in place, just put a nail through one end so that you can place it firmly in the ground. No need to put any bait in it. The slightest misstep will set them off. I've had no problems since.

Be glad you don't have my dog. She is a strawberry hound. And she's a tomato hound and a potato hound, corn hound etc etc...

I agree with others you've got to cage them or put netting over them. Simple structure could be made out of pvc. I want to add strawberries next year again in a raised bed. I'll be using chicken wire because my dog's nose can't get through.

I often have problem with slugs devouring strawberries overnight. Watch for those and perhaps use a weed barrier to keep the area clean(I know Strawberries run).

Squirrels ate my strawberries all the time until I put netting over them. Now, they still sometimes reach under and eat the ones closer to the edges. They don't even have the courtesy to eat the whole thing, they instead waste it, by taking a bite and tossing it. My neighbor doesn't cover hers, and I see them sitting on my deck railing (my deck is right next to her strawberry patch), munching on her strawberries. I'd try covering yours with bird netting.

A small cage of chicken wire firmly bent around the pot should keep the critters at bay. I sympathize, I lost most of my strawberries to stinkin ground squirrels this summer. They weren't fenced, but will be by next summer!

The catbird always likes to steal my strawberries, gooseberries, currants and blueberries. We have a constant argument over whose berries they are, but he has a lot of personality so I share (cover some, leave some).

For you bird eaten tomatoes, you could try now, but it will definitely work next year. Make sure you have a bird bath in the garden where the birds can get water. I find they (and squirrels) usually attack tomatoes during drought. Next year, before your tomatoes ripen (or now, pick them when they blush), hang red Christmas balls in the tomato plants. The birds will peck them and think the tomatoes make nothing good to eat. Warning - they will destroy your Christmas balls, so don't use anything important.

Good luck,
Bellatrix