What relative humidity range is generally acceptable for secondary enclosures?

What relative humidity range is generally acceptable for secondary enclosures?

• A. 10-20% relative humidity.
• B. 30-70% relative humidity.
• C. 80-90% relative humidity.
• D. 0-10% relative humidity.

Answer: (B)

Maintaining appropriate humidity in secondary enclosures is crucial for animal welfare because relative humidity influences respiratory comfort, skin condition, and the growth of microbes. A middle-range level around 30-70% provides enough moisture to keep mucous membranes and skin from drying out, reducing irritation and susceptibility to infections, while also limiting excess moisture that can promote mold, mildew, and ammonia buildup. Lower levels (very dry air) can dry nasal passages and eyes and irritate the respiratory tract, whereas very high levels (very humid air) create damp environments that foster microbial growth and poor air quality. Because this moderate range supports a broad mix of species typically housed in secondary enclosures and helps balance temperature interactions, it is generally considered acceptable.

Maintaining appropriate humidity in secondary enclosures is crucial for animal welfare because relative humidity influences respiratory comfort, skin condition, and the growth of microbes. A middle-range level around 30-70% provides enough moisture to keep mucous membranes and skin from drying out, reducing irritation and susceptibility to infections, while also limiting excess moisture that can promote mold, mildew, and ammonia buildup. Lower levels (very dry air) can dry nasal passages and eyes and irritate the respiratory tract, whereas very high levels (very humid air) create damp environments that foster microbial growth and poor air quality. Because this moderate range supports a broad mix of species typically housed in secondary enclosures and helps balance temperature interactions, it is generally considered acceptable.