A vigil for the deer due to be culled at Sellafield will be held this weekend.
The deer have become trapped between two security fences at the nuclear plant in west Cumbria.
Radiation Free Lakeland has organised Sunday's Free The Deer/Cull Nuclear protest outside the site gates.
There are thought to be between five and 15 deer involved.
The company says it is acting on advice from experts from the Deer Initiative who say culling the animals is the most humane thing to do.