No matter what the chemical manufacturers say, you should avoid exposing your dog to chemical weed killers. If possible, use an organic alternative that is less stressful to the environment and much safer for animals, including humans and dogs. Never let your dog near fresh week killer spray or granules that can adhere to a dog’s paws.
It is vital that the chemical is dry before allowing your dog to walk or lay on areas that have been treated.
One of the reasons that weed killers should be avoided if you own a dog is that many contain glyphosate (there are many other toxic chemicals), which may cause cardiovascular, gastrointestinal, nerve and respiratory damage. Independent research has shown that many weed killers are harmful long after they are first applied, despite what the manufacturers say.
It is definitely better to err on the side of caution and keep your dog away from chemical applications of weed killers. If you absolutely have to use toxic weed killers, follow the manufacturer’s directions. If possible, allow more time than they recommend before allowing your dog in the area. Failure to do so can result in severe illness and even death.