Is 24D Harmful to Animals

Some of the ester forms of 2,4-D can be very toxic to fish and other aquatic life. The salt forms may be only slightly toxic to aquatic animals. Aquatic animals are more sensitive to 2,4-D as water temperature rises. 2,4-D may be moderately toxic to practically non-toxic to birds if they eat it.

How long after spraying 2,4-D is it safe for pets?

So, to be safe, you really shouldn’t allow dogs (or children) on a chemically-treated lawn for at least 3 days after it’s been sprayed.

Will 2,4-D harm cattle?

2,4-D is an herbicide of small toxicological consequences for cattle kept under in natural grazing systems.