Don't they have companies that use animals to literally 'sniff' them out?

Fred wrote:
If your house looks perfect from the outside how do you know if it doesn't
have termites feasting on the inside? What other methods to use to locate
termites other than poking around with a screwdriver and visual inspection?
Would a maintenance contract with a pest company be advisable regardless if
there are termites or not or would DIY method be sufficient?