Crisps and even chocolate are some of the foods being given to the deer in Dublin's Phoenix Park.
Rangers are urging you not to feed or take selfies with the animals while out on their Christmas walks.
More than 500 wild deer roam the Phoenix Park.
People in the park are being told to keep 50 metres away.
Instead of feeding and taking pictures with the deer - post boxes for children to drop off their letters to Rudolf have been installed.
Storm Chandra: Yellow Weather Warnings for Wicklow
Wicklow Sees Strong Uptake in Vacant Property Refurbishment Grant Scheme
Uisce Éireann Slammed In The Dáil For Blocking Housing In Rural Wicklow
Ardmore Studios Hails Oscar Nominations For Blue Moon Including For Bray Favourite Ethan Hawke
Calls For Wicklow County Council To Stop Using X Immediately