How long does it take for a cat to stiffen? - briefly
A cat’s body typically begins to stiffen, a process known as rigor mortis, within 1 to 3 hours after death, and it can last up to 24 to 48 hours.
How long does it take for a cat to stiffen? - in detail
The process of a cat’s body stiffening after death, known as rigor mortis, typically begins within 1 to 3 hours post-mortem. This stiffening occurs due to biochemical changes in the muscles, where calcium ions leak into muscle cells, causing the fibers to contract and lock in place. Rigor mortis usually starts in smaller muscle groups, such as those in the eyelids, jaw, and neck, before progressing to larger muscles like those in the limbs and torso. The process reaches its peak stiffness around 6 to 12 hours after death, depending on factors such as the cat’s size, age, environmental temperature, and physical condition prior to death. In warmer environments, rigor mortis may set in more quickly, while colder temperatures can delay its onset. After approximately 24 to 48 hours, the stiffness begins to dissipate as the muscle tissues break down further due to enzymatic activity and decomposition. This natural process is a standard part of post-mortem changes and varies slightly depending on individual circumstances.