On average, a calf at birth weighs around 70 to 120 pounds. This range of weight is depending on many factors, such as if the mother is a beef or dairy cow, the breed of cow, and if the calf is single or a twin. A single calf usually weighs heavier than a twin, due to the competition the two twin calves have to share the same space and nutrients from the mother.

A newborn calf’s weight is important for the health and survival of the calf. A healthy calf weighs at least 70 pounds and does not excessively lose weight within the first few weeks of its life. If the calf does not gain weight in its first few weeks, it will likely experience health problems and have a higher chance of not surviving.

The calf’s mother’s health is also a factor that can affect the calf’s weight at birth. If the mother is healthy and eating enough nutrition, the calf will be born with a healthy amount of weight. If the mother is malnourished, the calf will be born with less weight or even weak and frail.

The breed of cow also plays an important role in the calf’s weight at birth. Different breeds of cows can produce different weights of calves. Typically, commercial and leaner breeds of cows will produce lighter calves, while heavier breeds of cows, such as those bred for beef, will usually produce heavier calves.

The size of the calf’s head and shoulders also affects how much the calf will weigh at birth. A larger head and shoulders mean a heavier calf at birth. The size of the head and shoulders are determined by the size of the mother’s pelvis, as it is the size of the pelvis that determines how large of a calf the mother can give birth to.

Another factor that affects a calf’s weight at birth is the time of year it is born. Calf births are most common in the spring and summer months, when there is plenty of food and pasture land available for the mother cows to eat. During these months, it is easier for the cows to produce stronger and healthier calves that can be born with a higher birth weight.

In conclusion, the weight of a newborn calf is important to its survival and health. The calf’s weight at birth can be affected by factors such as the breed of cow, the mother’s health, the size of the calf’s head and shoulders, and the time of year the calf is born.