Mothballs deter cats, but using them for this purpose is not recommended as they are highly toxic, according to the Pet Poison Helpline. When ingested, mothballs can kill cats, dogs and other pets. The vapor they give of... More »

There are a number of natural steps that can be taken to repel snakes without the use of toxic poisons. One method is to make an area less appealing to them by clearing away piles of leaves, tall grasses and debris. More »

Sulfur is commonly used as a snake repellent, but it is not an effective manner to deter snakes. Mothballs are another common method to repel snakes that does not work. More »

Lucky bamboo, also known as dracaena, is mildly to moderately toxic to cats and dogs, according to the Pet Poison Helpline. It is poisonous due to unknown steroidal saponins contained in the plant. More »

Naphthalene, the active ingredient in most mothballs, does a poor job of repelling squirrels and other animals. Additionally, the Environmental Protection Agency regulates products containing naphthalene as pesticides an... More » Pets & Animals Mammals Rodents

Some plants that are toxic to cats include English Ivy, lilies, oleander, tulip bulbs and azaleas, according to PetMD and the American Society for the Prevention of Cruelty to Animals. Cats enjoy chewing on plants, so it... More » Pets & Animals Pets Cats

According to the American Heartworm Society, coughing, difficult breathing, fatigue, vomiting and loss of appetite are common symptoms of heartworms in cats. Cats can die suddenly after being infected with heartworms eve... More » Pets & Animals Pets Cats