Cancer: Some cancers hinder nutrient absorption, prompting cats to eat more. Watch for lethargy, vomiting, or weight loss, and consult a vet promptly. Aging: Older cats may experience changes in ...
A cat may throw up for many reasons, ranging from benign to fatal. According to Kornreich, undigested hair – commonly referred to as hairballs – could be the cause of some cats' vomiting.