Can animals understand other animals?
To a limited degree. Two dogs understand the difference between "I'm mad at you" (snarling) and "I like you" (wagging tail). Honeybees, upon finding flowers, return to their hive and do a dance which tells the other bees in the hive the direction to fly to get to the food.
My Dog understands me, I am not a dog.
My dog barks to warn me if anyone is on our drive, I understand him
My dog will howl if he hears an ice cream van to let me know i need to find a £1
If a bird gives a warning call to its flock other animals can recognize the warning and be alert
Most animals can understand things that other animals motion, or
use vocals. They lick each other, beat each other, growl, etc.,
so.... yes. Animals can understand each other.