Dog owners are asked to keep their pets under control after a Swan was found dead in Castletown last month.
An investigation carried out by DEFA found the bird's injuries were 'consistent with a dog attack'.
The Mute Swan was found near the silverburn river - where they're often found in pairs with offspring near the harbour.
The birds are protected against intentional or reckless injury under the 1990 Wildlife Act.
Anyone with information about this incident are asked to get in touch with ecopolicy@gov.im.
Do you know these men?
Garage warns of pothole which broke two wheels today
TT riders will miss special Bray Hill tree
Inflation steady at 3.3 per cent
Less than one percent of buildings on council blacklist
Senior Tynwald committee to look at healthcare funding
Government apologises after child benefit problems
Noel Edmunds gives more details on IOM wine