RewriteEngine on
Options +FollowSymlinks
RewriteBase /
RewriteCond %{HTTP_HOST} ^([a-z.]+)?newportanimalhospital.com$ [NC]
RewriteCond %{HTTP_HOST} !^www\. [NC]
RewriteCond %{REMOTE_ADDR} !^192\.168\.100\.67
RewriteCond %{HTTP_HOST}   !^www\.newportanimalhospital.com [NC]
RewriteCond %{HTTP_HOST}   !^$
RewriteRule .? http://www.%1newportanimalhospital.com%{REQUEST_URI} [R=301,L]