One of these animals gave birth to a child that had to be fed an entire cow's milk each day, but was killed when it was shortchanged by greedy milkmaids and began hungrily eyeing the local herd. That one, like his twin Sceolan, came to be one of these creatures when Iollan's mistress jealously turned Uirne into one. Mabon ap Modron is the only person capable of tracking down one of these animals, so Culhwch is forced to find him while hunting for a different animal. Drudwyn is one of these animals, a group of which are accompanied by a cackling
One of these animals gave birth to a child that had to be fed an entire cow's milk each day, but was killed when it was shortchanged by greedy milkmaids and began hungrily eyeing the local herd. That one, like his twin Sceolan, came to be one of these creatures when Iollan's mistress jealously turned Uirne into one. Mabon ap Modron is the only person capable of tracking down one of these animals, so Culhwch is forced to find him while hunting for a different animal. Drudwyn is one of these animals, a group of which are accompanied by a cackling old hag named Night-Mallt. An encounter with a white, red-eared group of these animals belonging to Arawn proves troublesome for Pwyll. A geis is violated when a hero is offered the meat of this animal by a crone. Setanta received the name "Cuchulainn" after killing, and taking the place of, one of these animals who was responsible for guarding Culann. For 10 points, name these loyal domestic animals.