their paws
All body parts are used for survival in a Koala or anything else
beak
they used by pointed beak
they used their sharp,strong,and pointed teeth
lizards-stiky tongue for getting food
teeth used to make food into simpler compounds whereas all other parts of our body also break the food into more simpler compounds to digest
Its mouth of course controlled by the long neck
It's mouth and front paws.
Dog food, particularly in the USA is not made from horse meat as American horses are not safe for human or animal consumption due to toxic substances used to keep horses healthy. Horse meat was banned in pet food in the USA in the 1970's. In other parts of the world horse meat may still be used but it is not common as horse meat is considered a delicacy.
Technically, yes. There are parts of the body in traditional chinese medicines.
All animals needs food in one way or another, but not all of the food will be possible to use. The parts that are eaten but not used by the body are removed from the body as faeces and or urine