Nowadays a lot of people keep pets in their homes, both in flats and in houses. Is it pleasure or nuisance to do that? I will try to show different point of views about this phenomenon. It is obvious that people who have pet are joyful. Domestic animal is always waiting for its owner, greets him with joy. Pets can improve people’s mood and relax them. Obligations connected with having a pet, can be healthy for humans. For example walking the dog in the fresh air can be a stress buster and make us forget about problems. People living in cities are very busy and have no time for nurturing friendships. Pupil can replace all the needs of human interpersonal relationships. On the other hand, keeping animals in the big city, especially in a small apartment can be a problem. The noises that are caused by pets, like dog’s barking, can disturb our neighbors. Another problem is the appropriate behavior of the owner. People generally do not take care of the cleanliness of our environment. Few people, for whom this is important are cleaning up after their dog. Unfortunately some owners do not think about animals, they do not go with them to the vet regularly. This may pose a hazard to the development of a threatening human diseases. In summary, this situation has both positives and negatives. Having a pet is undeniable pleasure, but this entails responsibilities which may be a nuisance.