Several types of contaminants can be found in animal feed: - Mycotoxins: Toxic metabolites produced by fungi, including aflatoxins, ochratoxins, and fumonisins. - Pesticides: Chemicals used to kill pests that can remain as residues in feed. - Heavy Metals: Elements like lead, mercury, and arsenic that can be toxic in high amounts. - Industrial Chemicals: Substances such as dioxins and polychlorinated biphenyls (PCBs) that can enter the feed through environmental contamination.