Bibi and Tina, Racehorse in Distress

Bibi and Tina are curious when they see a black mare standing in the front yard at Dr. Robert Squirrel's house. The vet explains that the horse has psychological trauma from an accident. The owner left it to him, but he doesn't have the time to look after it. Of course Bibi and Tina jump in, but can they help "Blackbird"?