Dogs

Sometimes your pet dog moves its legs in its dreams. It may dream about running or playing with you.

Zebra finches(斑胸草雀)

Zebra finches are famous for their songs. But they aren't born singers. They remember and practice songs in their sleep. The birds can also make little changes to their songs in their dreams.

Cats

When the sleeping cats put up their heads, they may be watching something in their dreams. When they arch (拱起) their backs, they may dream about getting close to their prey (猎物).

Rats

Scientists let rats run through a maze(迷宫) during the day. At night, they can dream about running around in the maze again.