Herbicides are often as toxic to dogs as they are to plants. However, you can eliminate weeds organically with items that are most likely in your kitchen and are safe for both your pets and the environment.
Vinegar kills a variety of weeds. Just fill a spray bottle with undiluted vinegar and spray it on the weeds, soaking them well. The acidic vinegar will cause the weeds to shrivel and die within two days. Old and tough weeds may require several applications. Even so, the vinegar will not reach the roots and the weeds may resprout. Vinegar is most effective on younger weeds.
Corn Gluten Meal
If it's early in the season, you may be able to stop weeds from growing by sprinkling corn gluten meal in problem areas. Corn gluten meal inhibits seed germination, so use it where lawns and gardens are already established. You can buy corn gluten meal at a health-food store or at any store that carries feed for livestock.
As the old saying goes, "an ounce of prevention is worth a pound of cure." The best way to eliminate weeds is to prevent them all together. Planting cover crops, pulling the weeds when young and covering the weeds with plastic will help reduce or eliminate the weeds as they appear. Covering weeds with thick mulch will kill weeds off because they will not get light.
If you find your yard overgrown with weeds, he may be tempted to use herbicides. If you do, always follow directions and keep your pet off of it as stated in the directions. If there is no information regarding pets in the product, look on the label for the company's contact information and check with them for direction. If your pet does come in contact with the herbicide, be sure to wash him off and contact the ASPCA Animal Poison Control Center at (888) 426-4435. You may be charged a one-time $65 fee.