Energy Requirements

Question 1

What is the relationship between size and energy requirements based on?

Answer 1

the interaction between the animal’s weight and surface area

Question 2

Why is the relationship between size and energy requirements based on the interaction between the animal’s weight and surface area?

Answer 2

one of the main routes of energy loss is in the form of heat from body surfaces

the larger the surface area in relation the bulk of the body the higher the heat loss and the greater the need for energy replacement

Question 3

What is basal energy requirement?

Answer 3

the amount of energy required to keep vital organs functioning continuously

Question 4

What is resting energy rate?

Answer 4

the energy required by a relaxed animal in a thermoneutral environment

Question 5

What is maintenance energy requirement?

Answer 5

represents RER plus the energy needed for exercise, digestion and absorption of food

Question 6

How is RER calculated?

Answer 6

30 x weight in kg of the animal + 70
answer in kcal

Question 7

Why are the energy requirement calculations for sick and injured animals based on RER?

Answer 7

it is assumed that they will be unactive and confined to a small area

Question 8

What should the RER for moderate burns be multiplied by?

Answer 8

1.5

Question 9

What should the RER for severe burns be multiplied by?

Answer 9

2

Question 10

What should the RER for cage rest be multiplied by?

Answer 10

1.25

Question 11

What should the RER for early cancer be multiplied by?

Answer 11

1.25

Question 12

What should the RER for late cancer be multiplied by?

Answer 12

1.75

Question 13

What should the RER for sepsis be multiplied by?

Answer 13

1.5

Question 14

What should the RER for mild surgery/trauma be multiplied by?

Answer 14

1.25

Question 15

What should the RER for severe surgery/trauma be multiplied by?

Answer 15

1.5

Question 16

What is the average value for a dog’s MER?

Answer 16

RER x 2

Question 17

What is the average value for a cat’s MER?

Answer 17

RER x 1.4

Question 18

How much of an increase in energy do growing dogs need?

Answer 18

weaning up 50% of their adult weight - MER x 2

50%-80% - MER x 1.5
80%-100% - MER x 1.2

Question 19

How much of an increase in energy do growing cats need?

Answer 19

less than 3 months old - MER x 2.5
3-5 months old - MER x 1.6
5-7 months old - MER x 1.2

Question 20

How much of an increase in energy do pregnant dogs need?

Answer 20

1st Trimester - MER x 1
2nd Trimester - MER x 1.1
3rd Trimester - MER x 1.2-1.3

Question 21

How much of an increase in energy do pregnant cats need?

Answer 21

1st Trimester - MER x 1.1
2md Trimester - MER x 1.2
3rd Trimester - MER x 1.2-1.3

Question 22

How much of an increase in energy does an animal in peak lactation need?

Answer 22

MER x 2-4 depending on the litter size

Question 23

How much of an increase in energy does an inactive animal need?

Answer 23

MER x 0.8

Question 24

How much of an increase in energy does an animal in a cold environment need?

Answer 24

MER x 1.25-1.75

Question 25

How much of an increase in energy does an animal in a tropical environment need?

Answer 25

MER x 2.5

Question 26

How is MER calculated?

Answer 26

RER x 2 (for a dog)
RER x 1.4 (for a cat)