Chickens are birds, which are a different group of vertebrates from mammals. Birds lay eggs, while most mammals give birth to live young and nurse them with their mammary glands. The only exceptions to this are the platypus and echidna, which are monotremes, or egg-laying mammals.
In order for an animal to be classified as a mammal it must have hair, as well as fat glands and sweat glands. Female mammals have mammary glands. Mammals give birth to live young and nurse their young. All mammals are vertebrates, and also have several types of teeth.
Eliot Jan-Smith says
You are wrong chickens are mammals they have milk and everything
Ashtyn owens says
Ha-ha I have chickens and they do not have milk
Steven R. says
you are wrong! chickens probably have milk in their stomachs because they drank it (:
Alexie says
But chickens lay eggs and have feathers
Sorry to burst your bubble Elliot but chickens do not have milk
LINDSEY says
what the hell, please tell me you have no had offspring! chicken do not produce milk on any way or form!
Elijah K Barzeh says
chickens are not mammals, they are Fair away from mammals. Chickens are birds. Mammals form the most advanced class of animals due to their highly developed brain.
Chickens has feathers while mammals has fur or hair.
Anon says
Birds are a species. Mammals do not count as a species
Dennis says
Eliot all i can say is your dumb
DennisHater says
Dennis if you’re gonna insult someone’s intelligence use “you’re” correctly
curry says
thats a good one
Squeege says
Your all wrong they are actually reptiles
SoundtheTRUMPet says
Dennis is a reptile
Dennisthechicken says
Dennis is a chicken…. so is it a reptile, fish, amphibian, or mammal?
IdiotQueston says
they are not mammals you fool
Kamal says
Chickens are birds anD that’s that
DIDAM PETER says
U GUYS ARE CONFUSING ME I WANT TO KNOW IF REALY CHICKENS ARE ANIMALS