Story!
When trying to get the animals to go to the butcher store, they'll ask you for invitations, you have to make them and give them to the animals for gettin this achievement.
First, go to Nika's house and talk to her, select "Maybe Nika could design a ticket for the sanctuary", she'll give you one invitation, now we have to make copies.
Go to the library, use the acces card and the invitation on the printer in the first floor to get the pile of invitatations.
Go give the invitations to the animals in the farm.