A technician gathers (A) rose petals and (B) grape leaves before checking two young fawns. (C) After a few weeks of her care, they have habituated to her and approach her to take food. (D) It is extremely rewarding to her when a fawn shows affection. These fawns are used to introduce veterinary students to handling procedures with some wild ungulates; the habituation decreases the stress for the animals. Preferred and varied foods can enhance the quality of life of many species.