Woof

It's unknown who Gav's parents are, but the cartoon shows Gav living alone (possibly an orphan). He most likely met the puppy Sharik when the puppy was chasing a butterfly and barking, and Gav assumed the puppy was calling him.
Nothing but trouble
The black cat warned Gav that the name "Gav" wasn't the best name for a kitten and could even lead to trouble. Gav, however, doesn't understand what trouble is and goes into the yard. There, he encounters a dog who asks the kitten's name. Gav tells him his own name, but the dog thinks Gav is teasing him and starts chasing the kitten. However, an older cat distracts the dog, giving the kitten an opportunity to escape. When his rescuer asked, "Well, my friend, are you convinced that there was nothing but trouble waiting for you in the yard?" the kitten replied, "No, I'm not convinced. I was looking and looking. I almost found it, but the dog chased me away."

Where is it better to be afraid?
Gav is sitting in the attic during a thunderstorm, terrified, but is suddenly found by a puppy searching for him. When asked, "What are you doing?" Gav replied, "I'm scared," to which Sharik suggested they share their fear. Later, Sharik suggested Gav share their fear downstairs, but Gav didn't like it at all, as the thunderstorm couldn't be heard down there, making it uninteresting to be scared. So the friends continued their fear of the thunderstorm in the attic.
Middle of a sausage
Gav is walking down the street, looking for something to eat, seeing a dog eating a bone and a cat eating a whole fish right before Gav's eyes. While walking, he finds Sharik, who has a sausage on a plate. Sharik asks if Gav is going to find something for lunch, but Gav replies that he can't have lunch because he hasn't had breakfast yet. Sharik then suggests that Gav eat the sausage together, but asks how they will divide it. Sharik suggests that Gav eat both sides of the sausage and meet in the middle. Having devoured the sausage in a flash, Sharik asks if they really have reached the sausage, but Gav concludes that it doesn't matter anymore, since there are simply no more places left on the sausage.
It's so unfair
Black cat running away

Sharik is a mongrel puppy and Gav's best friend, with whom they constantly play together, chasing each other. Their species differences don't hinder their friendship, and they constantly invent all sorts of games, including creating an entire made-up language that no one else (not even they) will understand.
Black Cat is Gav's "teacher," constantly trying to teach him a lesson and explain the cruelty of the world around him, but Gav often misunderstands his words. However, in some episodes, the cat acts as an antagonist, trying to steal Gav's cutlet or chasing him away when he distracts him from hunting mice.
The dog is an animal that Gav respects, but it seems that the dog himself does not like Gav and is extremely aggressive towards him, only occasionally making contact with him.

Even as a very young cat, Gav is presented as a sweet and very naive child who knows little about the world around him, constantly trusts everyone, and tries to look for the good in life, not realizing that he sometimes faces real danger. What distinguishes Gav from ordinary cats is his name and his friendship with a puppy named Sharik (a name that, according to the adult cat, brings him nothing but trouble, but he himself can't understand who these "trouble" are or why they're looking for him). It's also worth noting that until the very last episode, Gav didn't have an owner.

The cartoon also played on the similarity between the name "Woof" and the sound of dogs barking, so at the beginning and end of each film, Woof himself clarifies whether he is being called somewhere or whether it is just someone barking.

Gav is a small, sandy-colored Siamese/Thai kitten with a brown face, paws, ears, and tail, as well as large blue eyes. He lives in an abandoned building in the courtyard.

Kitten Gav is the main character of the Soviet cartoon series "Kitten Named Gav." He is an orange-brown kitten with an unusual name who is friends with a puppy named Sharik.