If you already have a traditional chemical weed killer (such as one containing glyphosate), don't throw it out quite yet. Highly effective glyphosate weed killers can still be safe for pets as long as they are used appropriately, according to a study from the University of Maryland.

Is weedkiller dangerous to cats?

Cats can inadvertently become exposed to and potentially poisoned by weed killers. ... Cats are generally exposed to weed killers during, or soon after, their use by walking on treated grass or brushing against wet plants and then grooming.

How long after spraying weeds is it safe for pets?

A general rule of thumb is to keep the pet off the lawn for 24 hours after making an application. Many of these products dissipate with water, so if you want to be sure, water your lawn the next day before bringing out your dog.