Which of the following signs might be an indication that the animal has ectoparasites?

• A. Itching
• B. Hair loss
• C. Skin lesions
• D. All of the above

Answer: (D)

External parasites irritate the skin, so itching is a common sign as animals react to bites or saliva. Scratching and rubbing can lead to hair loss from physical wear and inflammatory responses. Skin lesions may develop from ongoing scratching and from secondary bacterial or fungal infections, or from direct parasite activity. Seeing itching, hair loss, and skin lesions together strongly points to an ectoparasite infestation, so all of the above is the best answer.