Question: how fast does fat spread around the body? Does it travel faster with animals?

Hannah Moir answered on 16 Mar 2016:

When you consume food, any excess energy or intake not used is stored as fat and takes about 12-24hours.

Fat cells live for an average of ten years. Once a fat cell dies the body makes a brand new one to take its place.

Comparison to animals depends on the diet of the animal and how long theu spend lying down.