Nutrition Flashcards
What is nutrition?
How something takes in and utilises food
Linked to health
What are the different types of herbivores?
Foregut fermenter - ruminants
Hindgut fermenter - horses and rabbits
Non fermentation - rodents
What are the two different types of net energy?
For production
For maintenance
What percentages mean what for dehydration?
10% - bad
15-20% - death
What are the main monosaccharides?
Glucose
Fructose
Mannose - doesn’t occur in free state
Galactose - “
What makes lactose?
Glucose and galactose
What are the main disaccharides?
Sucrose
Maltose
Lactose
What are the main polysaccharides?
Starch
Glycogen
Cellulase
What are the 8 biological functions of proteins?
Enzymes Structural Transport Storage Contractile Hormones Protective Toxins
What different types of protein are there?
Simple
Conjugated - eg. holoprotein
How many essential amino acids are there?
8
What are essential in a cats diet?
Taurine
Arginine
Vitamin D
Niacin (B3)
How do you work out the crude protein?
6.25 x total nitrogen
What percentage of crude proteins are nitrogen?
16%
How do ruminants break down protein?
2 stage process
Symbiotic protozoa eat the protein - microbial crude protein
Then the cow digests the protozoa
What is the dietary requirement for saturated fatty acids?
More than 0.45
What are the two types of minerals?
Macro and micro
What are the macrominerals?
Ca, P, K, Na, Cl, S, Mg
What are the microminerals?
Fe, I, Cu, Mn, Zn, Co
What are the two types of vitamins?
Fat soluble
Water soluble
Which of the two types of vitamins is it toxic if there is an oversupply?
Fat soluble
What are the 6 main things to think about when formulating a diet?
Energy Protein Essential fatty acids Minerals Vitamins Water
What are essential in a dogs diet?
Vitamin D
Polyunsaturated fatty acids
Linoleic acid
What does adipsia mean?
No water intake
What is normal water intake?
2ml/kg/h
What are the three different types of feeding?
Ad lib - cats
Portion - dogs
Timed
What is different about wet food to dry food?
Wet - low energy density, higher in fat
What are the concequences of taurine deficiency?
Blindness
big floppy heart - dilated cardiomyopathy
reproduction problems
How do you work out the amount of calories in food?
- 5 x 1g of protein
- 5 x gram of fat
- 5 x gram of carbs
When do cats move onto adult food?
12 months
When does lactation peak?
4 weeks after birth
How much less do queens need after neutering?
Up to 30% - risk of obesity
When is an animal considered geriatric?
Last 25% of life - 15+ years old
How should you feed animals when theyre geriatric?
Cats - more as they cant digest as much
Dogs - less as tend to get overweight
What proportion of daily intake should be a complete diet?
more than 90%
What is forage?
Fibrose material that grows - main part of herbivore diet
WHat is the name of grass sown for forage purposes?
Ley - usually there for less than 5 years
What makes up rough grazing?
heather, fescue
WHat makes up most of permanent pasture?
Ryegrass
What are legumes for pastures?
Alfalfa, clover - fix nitrogen
What fertiliser is usually used?
NPK
WHat pH is aimed for in pasture?
6
What is the effect of age on grasses?
More lignin
More cellulose
Less protein
Where does maize need to be grown?
Warmer climates - dies in less than 6 degrees
Where is maize used and why?
In dairy feed as it has high energy (fibre and starch) and dry matter
When is maize harvested?
When its dying, >25% DM
What are the three whole crop cereals?
Wheat, barley and oats
When are whole crop cereals cut for silage?
Two weeks after ear emergence - 30-60% DM
What are the main roots?
Beets
Swedes
Leafy brassicas - kale and turnips
When are roots planted?
After cereals have been harvested
Animals can graze on them in the winter
WHat happens when silage ferments?
The carbs turn into lactic acid due to anaerobic conditions
THis reduces the pH - pH is dry matter dependent
What chemical will spoil the crop ?
Butyric acid
What happens during aerobic spoilage of silage?
Yeast and mould grow - toxic
How is hay made?
Dried out in sun - needs 4 to 5 days
High nutritive losses
What cause nutritive losses?
Enzymes Mould Oxidation damage leaching storage
Adv of hay?
more palatable
storage
less likely to be contaminated
What is haylage?
Water content between hay and silage
Some fermentation - wrapped
more expensive
Fed to horses
What is straw?
The dried stems of cereals - wheat, barley and oats
What does a diet high in concentrates need?
Roughage like straw in the diet
WHat are the different types of concentrates?
Straights - one thing
Mixes - pellets or mix
What do the different straights look like?
Oats - long
Wheat - short and fat
Barley - in between
What are by products?
From brewing and food production
eg. Sugar beet pulp
WHat happens in nitrate poisoning?
Breaks down Hb
Blood turns dark brown
What causes photosensitisation?
hepatotoxic plants
eg. blue green algae
How much dry matter does a horse eat a day?
2-2.5% body mass
75% of that is forage
eg. 10kg for 500kg horse
How much water does a horse drink a day?
40-60ml per kg
50 litres a day
What must you do to sugar beet pulp?
Soak it
How much protein does a performance horse need?
Less than 12% of diet
When are foals weaned?
6-8 months
When should you feed a horse before a competition?
8 hours before
Can have forage in between