The Irish Greyhound Board says five cases are currently under investigation following calls to its care line.
It was set up a month ago over concerns about the treatment of animals in the industry.
The IGB says two further cases are being looked into by the Irish Coursing Club and a local authority.
Eight cases that have been investigated by IGB Welfare Officers are now closed.
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One 'Fixed Payment Notice' was issued as a result of those investigations.
