Most form pairs during the breeding season, but in some species, such as fur seals, the gray seal (Halichoerus grypus), and elephant seals, males (bulls) take possession of harems of cows and drive rival bulls away from their territory.
Look for the crooked tail. This is probably the best ways to tell if a cow has been bred: A cow or heifer will have a crooked tail or a tail that is held out in an odd angle than usual for 24 to 48 hours after being serviced by the bull. 1  4 Edit step.
Ad. 2. After 45 to 120 days have passed, get them in to the vet or in a handling facility (if you have one on your farm), to get them preg-checked. 1  There are four (4) different methods to preg-check cows, in order of the cheapest and most commonly used to the most expensive and less used for cattle producers:ow to Know when a Heifer or Cow Is Ready to Be Bred. How to. Know when a Heifer or Cow Is Ready to Be Bred. How to Tell when a Cow or Heifer Is in Estrus. How to. Tell when a Cow or Heifer Is in Estrus.