The veterinarians felt that the loss of her litter had caused the tigress to fall into a depression. The doctors decided that if the tigress could surrogate another mother's cubs, perhaps she would improve. After checking with many other zoos across the country, the depressing news was that there were no tiger cubs of the right age to introduce to the mourning mother..
Most people have heard of Koko, the gorilla who could speak. What most people don’t know, however, is that Koko was an avid Mister Rogers’ Neighborhood fan. When Fred Rogers took a trip out to meet Koko for his show, not only did she immediately wrap her arms around him and embrace him, she did what she’d always seen him do onscreen: she proceeded to take his shoes off.