John Brennan is devastated after thieves stole scores of his birds and killed dozens more.
The attack, which lasted around 15 minutes, was caught on a CCTV camera inside the aviary.
Mr Brennan is now considering what more he can do to improve security.
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Newark castle was bombarded with cannon fire this weekend as visitors flocked to the opening of the UK's first Civil War museum.
A mostly fine and dry day.
Drier and brighter today but becoming wet tonight.