Some Controller

def something
otheruser = 1
otheruserurl = animals.find :url, :conditions => {:user_id = ?, otheruser}
@user = User.find(params[:id])
@show = @user.animals.find :all, :conditions => {:user_id = ?, @user, :url !=> otheruserurl}
end

find all and display @user url that are not equal to otheruser's url