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www.reference.com/article/heifer-da7484e7053ce38a

A heifer is a young female cow that has not yet had a calf. During this period in a cow's life, proper attention to health and diet is vital.

www.reference.com/article/heifer-cow-44fe1a2aa7b3335f

A heifer is a mature female cow that has not calved, or given birth to a calf, yet. As soon as a heifer gives birth, she becomes a cow. A cow refers to a female of any age that has given birth.

www.reference.com/article/difference-between-heifer-cow-c1d2fbe00e137401

Although both are female bovines, one difference between them is that a heifer is a young female under the age of 3 years while a cow is an older female that has given birth to a calf. The term "heifer" refers to a young cow that is weaned, is not over 3 years and has not had a calf. Sometimes, the

www.reference.com/article/heifer-prices-determined-74b726b04f812e07

Producers determine the prices of heifers by considering the strength of the forces of demand and supply in the market. The Department of Agriculture's Agricultural Marketing Service collects and disseminates information on the sale price of livestock. This information allows producers to determine

www.reference.com/article/places-buy-holstein-heifers-3f5cba23121ea104

There are online resources to aid people in finding Holstein heifers for sale including BestFarmBuy.com, CattleRange.com and Cattle-Exchange.com. Not only do these websites have ads for individual sellers, but they also feature breeder directories, auction information and market reports.

www.reference.com/article/much-calf-cost-82b428bf58f1265a

The cost of a calf, which is the offspring of an adult cow, can vary depending on the breed. As of 2014, a Jersey bull calf, one month old, can be purchased for around $140. A Guernsey bull calf, 3 months of age, is about $150.

www.reference.com/article/calf-exercises-b3f6104b734e4c82

Popular exercises focusing on the calves include the single-leg calf raise, double-leg calf raise and the seated calf raise. According to WebMD, the key to toning and strengthening the calves is targeting the gastrocnemius and soleus muscles.

www.reference.com/article/calf-raises-9154412b6f83cceb

To do calf raises, stand on a step or an aerobic step platform with your heels hanging off the step. Raise up on your toes, then lower your heels below the platform to complete the stretch.

www.reference.com/pets-animals/long-cow-calf-once-pregnant-9de61f68cda13333

Once pregnant, a cow gives birth to a calf in nine months. The average cow has its first calf at around two years of age.

www.reference.com/pets-animals/long-cow-carry-calf-63a98d5a05c95992

A cow carries a calf for nine months, according to the Environmental Protection Agency. Females sexually mature at 15 months and are bred to optimally deliver their first calf at two years of age. After a brief two- to three-month interval, they are bred again.