Toxicity depends on many factors including: age, individual body chemistry, individual susceptibility, strength of the poison, quantity consumed, growing conditions drought, freezing, etc , season of the year, specific plant parts, and other variables.

As with all nutritional toxicology, it is the size of the dose, and the poison present in the plant that will determine whether the animal lives or dies. Some plants and materials are very toxic in small amounts, while others are cumulative and require consumption over a longer period of time. Other toxic materials frequently found around the home or on the farm are: creosote-treated wood excess grain consumption fertilizers herbicide's insecticides lead paint medication overdoses pastures, freshly fertilized rodent poisons

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