Why Do Dogs Develop Tumors?
📝 Summary
Dog tumors arise from inherited and age-related factors, hormone imbalance, weak immunity, and external triggers like chemicals, radiation, UV light, viruses, mold, and parasites. Lower the risk with sound feeding, limited sun, no moldy food, and regular deworming.
1 Internal Factors
Some breeds (e.g., Great Danes, foxhounds) are genetically prone, and family history matters for cancers like leukemia. Older dogs are at higher risk as their bodies and immunity decline; a few under two get papillomas. Hormone imbalance can drive cell overgrowth, and dogs with immune defects develop malignant tumors more often.
2 External Factors
Thousands of environmental chemicals (especially affecting liver and bladder) can cause tumors, as can ionizing radiation (X-rays, gamma) that damages DNA, and UV light – long sun exposure raises skin and melanoma risk, so limit basking and keep some coat length. Chronic irritation and non-healing wounds also raise risk. Viruses (150+ strains, including papillomavirus) and molds (aflatoxin-producing) or parasites contribute, so never feed moldy food and deworm regularly.
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