First and foremost, avoid acorns as best you can. Don’t decorate your home with real acorns. Fancy cornucopias in autumn are pretty—we get it! But it’s just not worth it to include items that could harm your pet. Outdoors, stay away from large oak trees whenever possible, as they’ll probably be surrounded by hundreds of fallen acorns.
Second, train your dog as early as possible to spit out whatever’s in his mouth as soon as you say, “Drop it!” This command serves many purposes, not the least of which is training your dog not to eat everything he sees.
Finally, keep outdoor food and water bowls away from oak trees. Jon Gellar, DVM, writes on Chewy that if acorns or oak leaves fall into a pet’s water bowl, their toxins could contaminate the water and make your dog ill.