Load Balalncing Anycast DNS using Round Robin and HAproxy

[ril.kidd]

Hello,
I have setup anycast DNS using BIND as the DNS server and BIRD routing 
daemon. I have 1 route server
and 5 route clients.
The route clients host the DNS service and also run the routing daemon. 
They are peered with the route server which propagtes their routes. They 
all run on Ubuntu Server 12.04.
It is my intention to provide load balancing in each route client by 
increasing the number of DNS servers in each route client.
I now have two DNS servers per route client (Master and Slave) with 
round robin DNS. I am aware that round robin provides load distribution 
and not realy load balancing.
Is there a way to load balance DNS in each route client cluster of DNS 
servers using HAproxy without any additional machine? Can HAproxy run on 
the DNS servers or is there a better way to load balance?

Thank you.