If they come into contact with its chemicals, yes! The chemicals in the products that TruGreen use are toxic to humans AND animals, so it’s incredibly important that you allow your lawn to dry totally before allowing any people or pups to frolic on it.
We’ve already provided the scientific evidence above, but it’s worth reminding you: it can take up to 48 hours for pesticides, insecticides or fungicides to totally dry. Even if the grass looks or feels dry to you, that doesn’t mean all of the chemicals are gone.
That being said, as long as you allow enough time between the TruGreen treatment and your dog running around (or peeing on…) your lawn, there’s no reason that they should succumb to any side effects afterward.
If your neighbor has had TruGreen visit, and it’s a particularly windy day, you should take caution allowing your dog to hang out in the yard, as it’s possible that some of the chemicals could have transferred.
When you’re worried about your pup and not sure how long it was since you applied the fertilizer (we’re talking days here, not hours) it can be helpful to blast your lawn with the hose to remove any lingering traces, just in case.