what are five mammalian traits in a fetal pig? | Yahoo Answers Apr 20, 2010Best Answer: All the traits of a fetal pig are mammalian. That's on account of it being a mammal.Status: OpenAnswers: 1 What Are the Major Mammalian Characteristics Exhibited by What Are the Major Mammalian Characteristics Exhibited by a Fetal Pig? Fetal pigs are mammals, and therefore have all the mammalian characteristics that are displayed at the fetal stage. Externally, fetal pigs have a small amount of short hair on their bodies and nipples on both sexes. What Three Traits Characterize the Pig As a Mammal A number of physiological characteristics must be present in an animal for it to be classified as a mammal. These traits include a four-chambered heart, a lower jaw made of a single bone, and three middle ear bones. Pigs meet all of these requirements. What are 3 mammalian characteristics that are exhibited by One of the characteristics of mammals that can be observed in a fetal pig include having hair. They are warm-blooded and need oxygen to live.