Animals cuddle to stay warm as a strategy to conserve body heat, especially in colder environments. By huddling together, they reduce the surface area exposed to the cold and create a shared warm microenvironment. This behavior also fosters social bonds and provides comfort, which can be beneficial for survival in harsh conditions. Overall, cuddling enhances their chances of staying warm and safe.
To conserve body heat/stay warm.
Well, first of all, animals cuddle with each other when they want warmth or protection. Most animals do this. I mean think about it, why do humans cuddle? Is not a thorow answer. The answer is animals do this to keep warm so they aren't too cold. Some animals do this because they have to, to survive. Others do this for protection, which I will give credit to the first person who answered this. But, the first person who answered this left out what animals do this. Meerkats & maybe lions do this, but these are not the only animals to do this. That is my edit to this answer. (:
Most animals have a type of fur that allows them to stay warm.
warmblooded animals keep warm by generating their own heat when they are in a cooler environment.
they stay inside and stay near warm places
they can cuddle their cubs too keep them warm.
they need to find ways to stay warm
Euglena are not warm blooded animals, however they need to stay warm to live. They also can live inside of a warm blooded animal.
No warm blooded animals die within 30-42 seconds of being in an environment that is more than .4 degrees colder then their internal body temperature. This is a severe danger to animals such as humans and small Brazilian mamalez who visit antarctika on their kwanza school break.
Because it is warm and all animals like warmth. It is also very good for predatory animals.
Fleas do not die in the wintertime. They either live on animals to keep warm, stay inside buildings, or find other places to stay warm.
For the same reason women like to cuddle with men - if they are mutually attracted. Physical attraction brings a need for physical contact, and a hug or cuddle is warm and loving.