This building was built as a Taco Cid and I ate there from time to time in the 1980s. I believe that Bright Animal Clinic was the first, and so far only, operation to use the building since Taco Cid left.
The clinic's closing sign mentions that they were established in 1971, so a) This is obviously not their first location and b) That's a 40 year run, and sounds like a well deserved retirement.
It will be interesting to see what happens with the building. There still have been no takers for the nearby Olive Garden and Red Lobster buildings, but the nearby laundry does OK, and there should be a fair number of ofice workers in the area after the county finishes the takeover of Decker Mall.
(Hat tip to commenter Matt)
UPDATE 18 April 2013 -- It's to be an Atlantic Seafood:
UPDATE 25 April 2013 -- The building sign is up: