A Family Cow

A family cow turns grass into a gallon or more of milk a day, plus butter, cheese, a calf, and manure for the garden. In exchange she needs milking twice a day, every day, for about ten months a year, and a plan that gets her bred and calving on schedule. Most of keeping a cow is understanding that cycle.

The twelve-month cycle

A cow only milks after she calves, so dairying runs on a yearly loop ¹:

1. Calving. Milk starts.
2. Lactation: about 305 days of milking.
3. Rebreeding. Most cows start cycling again 20–25 days after calving. Breeding usually starts around 55–60 days, and to calve again in a year she must be pregnant by about day 90. Heats come every 21 days, so that’s only a couple of chances ¹.
4. Gestation: about 283 days.
5. Dry period: about 60 days before the next calf. You stop milking, her udder rests, and the calf finishes growing ¹.

305 days of milk plus 60 dry is 365: one calf and one lactation a year. Miss the breeding window and the cycle stretches, with a longer dry period, a fatter cow, and lost milk ¹. Learn her heat signs, line up a bull or an AI technician before you need one, and write down every heat.

Calving

Most cows calve on their own. Call the vet early if something looks wrong, not after she’s exhausted ². The calf needs colostrum, the thick first milk full of antibodies, right away: wash and dry the udder, milk out colostrum for the calf, and freeze a gallon or more for emergencies ². In the days after calving, watch her for milk fever (low blood calcium: wobbly, cold ears, going down) and ketosis ².

Milking

Twice a day, about twelve hours apart, the same times every day. A routine that stays the same keeps her calm and keeps the milk coming. Clean, dry teats before milking; strip the first squirts from each quarter to check for clots or watery milk, an early sign of mastitis; milk out fully; and cool the milk quickly.

Drying off

Plan 6–8 weeks dry. Dry periods shorter than six weeks can lower the next lactation, and longer than eight tend to bring health and nutrition problems at calving ². A cow free of mastitis can be dried off simply by stopping milking. A heavy producer may need a few partial milk-outs and less feed for a few days ².

While she’s dry ²:

• Feed good hay; about 10 pounds of average alfalfa covers a dry cow’s protein needs, and grass hay makes up the rest.
• Don’t let her get fat. Fat cows have more calving and health problems.
• Aim for about two parts calcium to one part phosphorus in the diet to help prevent milk fever, with free-choice minerals and clean water.
• Check her and her udder daily as calving gets close.

The law

In Wisconsin, selling raw (unpasteurized) milk for drinking is illegal. The one exception is a narrow “incidental” sale to a consumer at the farm, for that person’s own household. It isn’t incidental if it’s a regular business or advertised in any way, and cow shares and herd shares don’t count as ownership ³. You may drink your own cow’s milk and serve it to family and nonpaying guests. Butter, yogurt, and cream sold to anyone require a licensed plant and pasteurized milk; cheese can be made from raw milk only if aged at least 60 days ³.

Try it

Before buying a cow, write out a year on a calendar: her calving date, the 55–90 day breeding window, the dry-off date 60 days before the next calf. Then decide who milks on the days you can’t, find a vet who sees cattle, and line up hay for the winter: a cow eats a lot of it.