April 2 (UPI) -- American tennis player Danielle Collins, who saved a dog that was hit by a car outside the Miami Open, says she wants to buy a donkey to add to her growing fleet of farm animals, which includes seven chickens. Collins spoke about her budding interest during Tuesday's Tennis Channel broadcast of the Charleston Open. The 31-year-old tennis star keeps animals at her 2 1/2-acre property in New England. Advertisement "My motto has gone, with my merchandise drop, to 'play tennis,