Ask TECO’s Kathleen Waligore if old dogs can learn new tricks and she’ll tell you about a pair of eight-year-old Shih Tzu mixes that over the course of six months went from not-housebroken to experts at providing comfort and healing. Waligore, manager of Corporate Cash, is the proud owner of Diamond and Ebony – and a novice dog owner at that – after a visit to the Humane Society of Tampa…