Cows Flashcards
Define bull
Intact male
Define cow
Intact female
Define steer
Male castrated young
Define heifer
Young immature female, has not calved
Define calf
Young cow
Define herd
Group of cows
Define freshening
Start of milk production after birth
Define first calf heifer
Young heifer has only had one calf
What are calf crates/hutches
Individual outdoor pens commonly used in the dairy industry
Good ventilation, separation, easy cleaning, easy access to door/water
What are calf barns
Not common in the dairy industry
Enclosed areas for groups of calves
Better for social interaction but harder to control disease
What should be measured daily on calves
Height
Weight
Average daily gain (ADG)
When should colostrum first be given after birth, and how much should they have in the first day
Within 15 minutes
6L in the first day
What is colostrum
First milk from mother with increased levels of blood proteins, vitamins, nutrients, minerals and maternal antibodies
What is passive immunity and how is it achieved in calves
Due to the underdeveloped abomasum and reticular groove which allows milk to bypass the rumen, omasum and reticulum, colostrum passes right into the abomasum and is absorbed into the blood stream (not broken down due to no stomach acid in abomasum)
This is the main level of immunity for a calve in the first days of life
After 3 days of colostrum, what can calves be switched to, which is the most ideal and why
Whole milk, milk replacer, mastitis milk, fermented colostrum
Whole milk is most ideal for its high energy levels and balanced proteins, minerals and vitamins
How much milk should a cow get each day
What should they also have access to constantly and why
4L of milk each day
Access to solid feed and water -aids in weaning
The faster the calf is eating solid feed the faster the ___ develops
Rumen
What is the typical feeding regime for calves
Feeding to appetite for first 3-4 weeks
Switching to restricted milk diet until 8-9 weeks (have access to solid feed and water)
Weaned by 3-4 months
True or false
Competition is a big problem in calves
True
How is competition reduced, what should you do in group housing
Reduced with individual housing
Consider restraints while feeding from a bottle vs a trough in groups
Calves are considered weaned when
They are eating 1kg of calf starter a day (grain based mixture of feed)
How do you stimulate rumen development
Solid feed
Calves fed mostly milk with have
Slow rumen development
Things to aid in weaning
Offering concentrates/pelleted/roughage freely
Restricted milk diets
Offering water
Calves weaned on pasture show
Reduced growth rates
When do you start weaning
3 months
What is a good indication of rumen development
The presence of rumination
What are purebred (seed stock) producers
Raise cattle with a breeding association with pedigrees and genetic merit documented to allow selective breeding
Replace heifers/bulls to increase genetic advancement in the industry