The purring of a cat is not just a sound of pleasure, but also a unique natural mechanism (frequency 20-150 Hz) that has a therapeutic effect on humans. It helps to relieve stress, lower blood pressure, accelerate the healing of wounds and fractures, and strengthens bones and joints through vibration.
Cats have a unique vision adapted to twilight due to the ability of the pupils to expand greatly and the presence of tapetum (tapetum lucidum) — a reflective layer behind the retina. This layer amplifies weak light, refracting it back to light-sensitive cells, which helps them see 6 times better than a person in the dark. This mechanism also causes the effect of "glowing eyes" and refraction of light in the eyes, which provides them with high sensitivity to movement.
The American Curl is a breed of cats from the USA (appeared in the 1980s), characterized by unique ears twisted back (90-180 degrees), like a rose. These cats are medium-sized (3-7 kg), can be short-haired and long-haired. They are characterized by an affectionate, friendly and playful nature, remaining active even in old age.
Exotic shorthair cats are a popular breed that combines the appearance of a Persian cat with a plush coat that requires less care. The advantages include a very affectionate, calm and friendly nature, high attachment to the owners, intelligence and good compatibility with children and other pets, which makes them ideal apartment companions.
The Siberian cat is a large, muscular breed with a thick, water—repellent coat that can withstand low temperatures. They are distinguished by high intelligence, family friendliness, but hunting instinct and independence. They are conditionally hypoallergenic, often have tassels on their ears and a bushy tail, and weigh from 4 to 11 kg (males are larger).

