In the late 1980s, Dr. Patricia Luttgen created the first hearing aid prototype by attaching a human hearing aid to a dog’s collar. Dog hearing aids have evolved considerably since then.

Goggles for dogs come in a variety of designs and colors and are relatively inexpensive. For dogs who swim regularly or participate in dock diving, goggles can prevent water from splashing in their eyes, limit the glare coming off the water, and reduce chlorine or saltwater irritation. In addition, goggles can be helpful for dogs prone to eye injuries including those who are blind, spend much of the day outside, or work in harsh conditions such as K-9s in law enforcement, the military, or search and rescue.

Devices that predict when a cow or heifer is going to calve exist: sensor-based monitoring of behaviour can provide timely predictions of calving and highlight breed-specific behavioural differences, supporting farm management and animal welfare.

The correct answer is D, virtual reality for chickens does not exist.

• For more information: https://www.akc.org/expert-advice/health/dog-hearing-aids/, https://www.akc.org/expert-advice/lifestyle/eye-protection-for-dogs/, https://www.sciencedirect.com/science/article/pii/S1751731126000558