Dove will see you now

A flock of pigeons, 2 looking at camera Image copyright Mohd RASFAN
Image Caption Pigeons have amazing visual memories
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Rat or pigeon may not be an obvious choice to tend to someone who is sick, but these creatures have some excellent skills that could help diagnose and treat human diseases.
Pigeons are often perceived as dirty and urban nuisance, but they are just the latest in a long line of animals that have been found to have the ability to help people.
Although, the brain is no longer than the tip of the index finger, pigeons are impressive visual memory.
Recently it was shown that they can be trained to be as accurate as people with breast cancer detected in the images.
Here are some of our feathered and furry friends that can have a big impact in medicine three.