What is a clinical sign of Lantana toxicity?

Photosensitization is indeed a clinical sign of Lantana toxicity. Lantana is a plant that contains compounds which can lead to the formation of reactive metabolites in the liver, causing damage and subsequent photodynamic reactions when the affected animal is exposed to sunlight. Photosensitization results in inflammation and damage to the skin, particularly in areas that are not protected by fur, leading to redness, swelling, and potentially severe skin reactions. This condition reflects the liver's impaired ability to clear these harmful compounds, ultimately leading to a buildup that manifests as photosensitization.

Other options do not represent typical clinical signs associated with Lantana toxicity. Excessive thirst, skin rash, and weight gain are not directly linked to the specific toxic effects of Lantana. While an animal may exhibit various nonspecific symptoms during illness, it is the distinct occurrence of photosensitization that is particularly indicative of Lantana poisoning.