[CentOS] ssh to failover target?

I have some machines that send ssh commands to a load balancer appliance 
that is really a pair of machines that can fail over to each other.  The 
ssh keys are set up on both targets, but whenever the active target is 
changed, ssh issues a warning about a "man-in-the-middle" attack also 
goes to the log and the console which tends to alarm the operators. 
Setting the strict host check to no lets the command complete anyway, 
but is there a way to get rid of the warning completely?

-- 
   Les Mikesell
    lesmikesell at gmail.com