cat or dog, which is better?

Cats is the best, of course...котэ рулят

Те, которые меньше надоедают.

Of course dogs are the best animals

dog may be trained to play several important roles in our life such as detection dogs, assistance dogs, hunting dogs, police dogs, search and rescue dogs or guard dogs. the only imporain cat's role is an ability to control the numbers of rats and other rodents