How does a rat look month by month? - briefly
During the first month the pup is hairless, eyes sealed, ears folded, and measures about 3 cm; by the second month fur emerges, eyes open, ears stand upright, and length reaches roughly 5‑6 cm. At three months the coat thickens, body length approaches 10 cm, sexual maturity begins, and by four months the animal displays full adult coloration, a robust frame, and a weight of 150‑200 g.
How does a rat look month by month? - in detail
Rats undergo rapid physical changes during their first three months.
In the first week after birth, the newborn is hairless, pink, and blind. The ears are folded, and the tail appears as a thin, translucent tube. Weight ranges from 5 to 8 g, and the body measures about 6 cm in length.
At one month, fur begins to develop, first as a sparse, grayish coat that soon darkens. Eyes open, revealing dark irises. Ears stand upright, and the tail becomes more robust, covered with scales. Body weight increases to 30–40 g, and length reaches 10–12 cm. Teeth erupt, enabling the animal to gnaw solid food.
By the second month, the coat becomes dense and uniformly colored, typically brown or black depending on strain. Musculature is more defined; the rat can climb, jump, and explore its environment with agility. Weight climbs to 80–120 g, and length extends to 15–18 cm. The tail is fully scaled, matching the body’s coloration.
At three months, the rat attains sexual maturity. The coat is fully mature, glossy, and may show subtle pattern variations. Body weight stabilizes between 150 and 250 g, and overall size reaches 20–25 cm, including the tail. Facial features are proportionate, with well‑developed whiskers and sharp eyes. Behavioral signs of adulthood appear, such as territorial marking and complex social interactions.
Beyond three months, growth slows, and the rat maintains the appearance established at sexual maturity, with minor variations due to age, health, and environment.