As noted in the last entry, any toxic substance that your cat walks through is dangerous, since the cat will lick herself and her fur in the process of grooming. If your cat plays outdoors, she will pick up any pesticides and other chemicals you spray on your lawn, and those useful lawn chemicals can end up inside your cat. They aren’t often fatal, but you need to monitor your cat’s activity in a freshly sprayed lawn, particularly since lawn chemicals are “in the air” for a time, leading to possible respiratory ailments.
