Facts about exotic animals
The concept of forcing wildlife to do underneath the large top is abnormal, outdated, and undeniably cruel.
Circus, a altering tradition
The standard circus concept, as created by Philip Astley in 1700s London, would be a show with clowns, acrobats, horses, music artists and ballroom dancers. Exotic creatures weren't area of the performances and were introduced later, in Australian circuses late 1800s. 
In individuals days circuses also showed titans, bearded ladies, conjoined twins etc. in 'freak shows' as well as Aboriginals as 'sideshow savages'.  But alterations in popular culture and moral values brought towards the decline of those types of entertainment and freaks and exotic human cultures grew to become the objects of sympathy and respect instead of fear or disdain. Regrettably, underneath the pretense of tradition, circuses for example Lennon Bros and Stardust Circus still create a mockery of exotic creatures by dressing them in shiny costumes and which makes them perform abnormal methods.
How exotic creatures suffer in circuses
Circuses defend using exotic creatures by declaring the creatures are loved and well looked after. But, contributing to a massive body of evidence, this year's scientific review 'Are wildlife suitable for a travelling circus existence?' through the College of Bristol within the United kingdom verifies that "the types of non-domesticated creatures generally stored in circuses appear minimal suitable for a circus existence." 
This comprehensive study implies that circus exercise pens and animal wagons were normally only 26 and 27% correspondingly from the already plain and simple suggested dimensions of zoo outside and indoor enclosures.  Tigers in circuses might even be stored chained continuously as much as 23 hrs each day.  These conditions cause severe stress to non-domesticated creatures, resulting in abnormal behavior (stereotypies) for example pacing by large felines, mind bobbing by tigers or mouthing cage bars.
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