Noun
An animal that suckles its young; a mammal.
Source: Webster's dictionaryCalf rearing systems The single suckler system of rearing calves is similar to that occurring naturally in wild cattle, where each calf is suckled by its own mother until it is weaned at about nine months old. Source: Internet
Of these, 565,000 were dairy cows and 99,000 were suckler cows. Source: Internet