What is a common symptom of cancer in small animals?

Weight loss is a common symptom of cancer in small animals due to several factors associated with malignancies. Cancer can lead to a decrease in the animal's overall appetite, resulting in weight loss over time. Additionally, tumors may cause changes in metabolism, leading to increased energy expenditure even when the animal is not physically active. In some cases, underlying diseases, pain, or systemic effects of cancer can also contribute to the catabolic state that precipitates weight loss. Monitoring for weight changes is therefore crucial in the early identification of potential cancer cases, as it can often lead to timely veterinary intervention and improved outcomes for the affected animal.