Companion Animal 1 Flashcards
What type of diet are commercial pet foods
Pet foods: total mixed ration (energy/protein/essential fatty acids/mineral/vit)
* Consumed to meet caloric requirements + nutrients provided in proportion
What are 3 types of energy source
- Via. Carbohydrates (3.5 kcal/g), protein (3.5 kcal/g), fat (8.5 kcal/g)
What determines food intake
- Caloric density determines food intake
- Requirement varies with life stage/activity/environment/dz
What are essential amino acids
- Required for essential amino acids (cant be synthesized)
What factors impact protein quality
- Protein quality depends on EAA amount/caloric content/digestibility
What type of protein is higher quality (animal or plant) and why?
- Animal protein = higher quality due to higher EAA content
What factor influences total protein content
- Total protein content: depends on amount needed to provide EAAs adequately
Explain the relationship between caloric content and EAA metabolism
- EAA’s are primarily used to make proteins – therefore higher calorie foods (meeting energy requirement easier) result in more efficient EAA use
o Excess EAA used for energy
Compare the protein requirement between cats and dogs
cat > dogs
What are the 2 main functions of fat in a diet
- Concentrated energy + palatability
What are essential fatty acids + examples? How much do you need?
- Essential fatty acids (not synthesized) – linoleic acid + linolenic acid + arachidonic acid (cats) – required at 2% DM
How are vitamins added to diets
- Fat (A/D/E/K) and water (B) soluble in premix – no requirement for vitC
- Add excess – account for loss in processing/storage (vit A/B destroyed by heat, vit E via lipid peroxidation)
How are minerals added to diets
- Part of purified premix (not contained in protein/fat sources)
What should be considered when thinking about minerals in the diet
- Must meet absolute requirements + maintain ratios (Ca:P)
- Should consider nutrient interactions (excess Ca reduces Zn absorption)
What are the functions of food additives? Give examples
- Gives color/flavour/texture/stability/resistance to spoilage
- Ex. antioxidant, antimicrobial preservatives/humectants (compounds that draw water into the product – prevent separation of gravies)/flavours/emulsifying agents/stabilizer/thickener/colourinig agents
- Some functions or nutritionally important and some are only marketing tools to humans
What are the nutritional features of dry food
- 90% DM – past was higher veggie protein/low fat but now high animal protein and fat
- Low in As-fed calories due to air bubbles forming in extrusion process
What are the nutritional features of canned food
- Higher water content can dilute calories/nutrient – as fed
Compare nutritional content of canned to dry food
- More energy DM due to higher fat + lower carbohydrates vs dryW
What institutions regulate pet foods in NA
Regulating Agencies (USA)
* FDA
* USDA
* NRC
* AAFCO: Association of American Feed Control Officials
What is the AAFCO? What does it do?
- AAFCO: Association of American Feed Control Officials
o Nongovernmental organization
o Guidelines for labelling and nutritional requirements
o Each state has separate regulations based on AAFCO guidelines (voluntary compliance)
o Most Canadian pet foods are American-based and follow AAFCO
o Set nutrient profiles and standardize feeding trial protocols
Growth/reproduction/gestation/lactation/maintenance
What are the labelling requirements set by AAFCO
o Labelling requirement:
Product name
Net weight
Name/address/website of manufacturer
Guaranteed analysis
Ingredients (by weight)
Words “dog or cat food”
Caloric content per unit of measurement
Statement of nutritional adequacy or purposes
Directions for feeding
What are the limitations of the ‘guaranteed analysis’ on a pet food label
(CP/CFat/Cfibre/moisture – list within a range, will put the numbers that look the nicest for the consumer = cannot rely on guaranteed analysis as evidence of quality or comparison between products)
What is NOT included as a pet food label requirement by AAFCO (4 things)
o Not label requirements
Digestibility
o Biologic value of protein (can estimate by the type of protein included)
Quality
Contamination
What is a concern with the directions for feeding on a pet food bag provided by the manufacturer
will recommend feeding the higher amount of food to avoid animals losing weight while eating their food