Here is a brief explanation of the Oplatki tradition...
Oplatek, taken from the Latin word oblatum, meaning Sacred Bread, has been the symbol of Christianity and Jesus Christ our bread of life since the Last Supper.
Traditionally at midnight the head of the household takes the pink oplatek and shares it with the animals on his farm or at his home. This custom brings us back to that Holy Night when even animals were able to speak, and to remind us that we are all God’s creatures.
[source - Church Supply Warehouse, http://www.churchsupplywarehouse.com/ ]