PowerPoint Presentation
Institute for Agricultural and Fisheries ResearchAnimal Science
Unit, Melle (Belgium)www.ilvo.vlaanderen.be
Impact of nutrition and managementon the occurrence and severity of
foot pad dermatitis
Huvepharma Seminar, Bruges 20-21/11/2013
Luc MaertensEvelyne Delezie
Foot pad dermatitis (FPD) ... wet litter
*
Different names: Foot pad dermatitis (FDP) Contact dermatitis
Pododermatitis Foot burn or - lesions Ammonia burn: > 50% of
manure N NH3)
(uric acid +H20+02: NH3 and C02)
What: erosion (necrotic lesions) of the foot skin
Cause: wet and sticky litter (FPD and wet litter: r = 0.9)
Intro
Development of broiler weight
?
Weight (g) at 42 days (males)
*
Reasons: Selection 80-90% Feed 10-20%
With increasing performance increasing FPD
Consequences: - Very high increase in daily feed and water intake -
From d25 onwards: >150 g feed or > 0.25 l water litter
quality - Fragile intestinal balance, quicker gut passage
Intro
Grafiek1
1700
2000
2400
2750
3100
Oost
Sheet1
198019902000201020152020
Oost170020002400275031003250
Foot pad dermatitis ... assessment
*
Excellent unacceptable
Intro
Scale 0 ...
....2 (3)
Intro: prevalence on farms
*
FPD farm score=100 x (0 x class 0 + 0.5 x class 1 + 2 x class 2)/ n
(= number of feet)
Broiler farms (cumulative %)
Situation in The Netherlands between April 2010 and April 2011
(Source WUR)
Intro
(Productschap Pluimvee en Eieren)
Adverse effects of foot pad dermatitis
*
Animal welfare (pain, move less, eat and drink less)Links with
prevalence of breast blisters & rejections at
slaughterhouseDirty broilers, catching ...A gateway for bacteria
(secondary infections)Reduced use of antibiotics (link with gut
health, litter quality)Economical value of feet (Asia)Reduced
performances (DWG & FCR) because of reduced mobility
(Audenaert, 2012)
Intro
Litter moistureDWGFCRProb. (P) with litter moisture, % 0.0360.001Corr. (R) with litter moisture, % -0.3730.544
FPD a multifactorial problem
*
Water: balance: intake, -losses, -system, -pressure Litter
material: type, thickness, Litter: wet, sticky, capped, caked
...Ventilation and floor: temperature, concrete,, ...Light:
distribution, colour, program, ... Density (33 -39 - 42 kg/m);
partial unloadingAnimal: age, weight, breed, sex, Gut health:
dysbacteriosis coccidiosis - ...NutritionRaw materials (vegetarian
vs animal origin, cereals ) Nutrients (minerals, protein content,
fat )Physical feed form (mash, pellet, whole wheat )Enzymes (NSP,
proteases, ....)Additives (acids, clay minerals, )Biotin, Zn
Management at farm level !
Overview
Wet litter . disturbed water balance
*
WATER BALANCE broiler:
SUPPLY LOSSES Feed ( 88% DM) Urinary (50%)+ drinking water (75% of supply)Faeces (water content 75-80%)+ Oxidation of nutrientsEvaporation (skin + exhaled gasses)(0.6 g H2O/g glucose; 1.7g H2O/g fat; 0.1g H2O/g protein)
Note: selection for extreme DWG (feed intake): loading of litter
E.g. Quickly growing (Ross 308) vs slower growing broiler (Sasso
T451)
Water
Litter of broilers: water balance
Ratio water/feed: 1.7 - 2.0; Feed cons. 0-40d/br: 4.25 kg
7.25 l
8.50 l
2.0 l
2.0 l
5.25 l
6.5 l
25-30% fixed in the body
50-75% by evaporation
3.60 l
1.65 l
3.5 l
3.25 l
For a house with 40 000 br or 2 500 m)
25 l/m or 65 000 l
50 l/m or 130 000 l
Or 3 000 to 6 000 l/day after the age of 25 days ! Ventilation!
Release of water!
Note: wood shavings: max. water retention 3.4 l/kg ; 2 kg/m or 7l/m
or 17 500 l/house
Optimal situation
Bad situation
Water
15 br/m
Wet litter dirty broilers FPD
Drinker height and water pressure
*
Drinking line height: appropriate to bird height (when standing
birds have to reach for the nipple): avoids water spillage or
playingMobile drinking lines: less FPD (more homogeneous
litter)Water pressure: age dependent (low for young birds, higher
with increasing age); FPD score: better with low pressure BUT
performances ...
FPD score
Weight, d 38
(Petersen, 2006)
Water pressure
Water
Grafiek1
2351
2380
2369
Kolom1
Blad1
Kolom1
Low2351
Medium2380
High2369
Als u de afmetingen van het gegevensbereik van de grafiek wilt wijzigen, versleept u de rechterbenedenhoek van het bereik.
Grafiek1
8
42
60
Kolom1
Blad1
Kolom1
Low8
Medium42
High60
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FPD and drinker types
*
Water spillage: drinking cups > nipples > nipples with drip
cups
(Van Harn et al., 2009)
Water
ParameterDrinking nippleDrip cupBody weight, d 35 (g)FCRWater/feed ratio2047 b1.603 b1.81 b2093 a1.595 a1.78 aDry matter litter (%)FPD Score 0 Score 1 Score 248.7 a
04 a9552.8 b
418 b78
Acidifying of drinking water
*
(Van Harn & De Jong, 2012)
FPD scores
Water
Control+ AcidifierControlled to the same water intake as with acidifierWeight, d 35FCR2106 a1.5841961 b1.5971974 b1.592Water/feed ratioDM litter (%)1.82 b60.7 a1.74 a65.6 b1.71a65.2 b
Grafiek1
38.547.514
3550.514.5
5.52866.5
Score 0
Score 1
Score 2
Blad1
Score 0Score 1Score 2
Controlled water38.547.514
With acidifyer3550.514.5
Control5.52866.5
Water binding capacity of litter material
*
* DM of 85-90%
(De Baere & Zoons, 2004)
(Youssef et al., 2010)
Litter
Litter *Specific gravity (kg/m3)WBC (g H2O/g litter)Wood shavings1203.4Wood (sawdust)1601.0-1.5Wheat straw602.6Barley straw601.9
FPD and litter material
*
Most used: wood shavings, chopped straw, peat, coconut fibers ....
Flax straw, chopped corn plant, rice hulls, sand, recycled paper,
...Peat > wood shavings (fine coconut)> chopped straw but if
straw if chopped in small pieces: improved litter and less
FPDPhysical form: soft (lignocellulose: water release!) and no
sharp edges (barley straw !)short (chopped straw: 2-4 cm): WBC and
stimulate scratchingDM of litter at start has to be high (85-90%)
and ventilate enough to maintain a good litter quality (DM>55%,
no crust on the top)
Litter
FDP and litter material
*
Average of 6 flocks, De Baere & Zoons, 2004
Litter
Grafiek1
56.73211.20.1
39.245.315.30.1
(1,5 kg/m)
(1,5 kg/m)
Score 1
Score 2
Score 3
Score 4
Blad1
Score 1Score 2Score 3Score 4
Wood shavings56.73211.20.1
Straw39.245.315.30.1
Als u de afmetingen van het gegevensbereik van de grafiek wilt wijzigen, versleept u de rechterbenedenhoek van het bereik.
*
FDP and litter material
FDP and litter material
Litter
Litter material and FPD in turkeys
*
Litter
Litter material and FPD in turkeys
*
Van Harn & De Jong, 2012
(Youssef et al., 2010)
Wet litter challenge: 8h/d at a continuously 27% DM , by adding
water
Litter
Wood shavingsLigno celluloseChopped strawDried mais silageDWG (d 15-42)FCR68.8 1.5167.1 1.6372.41.6172.01.60DM litter, %76.7 a83.2 b68.8 c75.0 a
FPD and bedding amount litter depth
*
Contrasting results: more bedding material does not necessary
result in improved FDP (1.0 vs 1.5 kg/m wood shavings or 1.25 vs
2.5 kg/m straw)Interactions with floor isolation, heating (e.g.
under ground), ventilation?If floor is well isolated: with a thin
layer of litter (0.5 1 kg/m) 1 cmIncreased scratching and turning
of the litter by the chicks Increased aeration, drier and friable
litterBut floor temperature! Pre-warmingSpreading of litter
material after pre-warming to avoid condensation If a cold floor: a
ticker layer of litter is required (>2-3 cm)
Litter
Effect of lava or clay minerals
*
Lava: 2 times/week: 70 g/m)
Clay minerals: 2 times/week: 70 g/m)
(De Baere, 2012)
Litter additions
Grafiek1
2266120
1562230
Score 0
Score 1
Score 2
Score 3
Blad1
Score 0Score 1Score 2Score 3
extra lava2266120
Wood shavings1562230
Grafiek1
1766170
1462240
Score 0
Score 1
Score 2
Score 3
Blad1
Score 0Score 1Score 2Score 3
Clay minerals1766170
Wood shavings1462240
FPD and lighting
*
EC regulation: min. 6h dark/24h with a 4h uninterrupted dark period
and at least 20 lux during lighting periodsImportant: uniform
distribution (also of feed, water, ventilation) promotes a
homogeneous distribution of birds and avoids bad zones Light bulbs
> fluorescent lighting (TL): less friable litter, decreased
FPDLED light: energy saving, homogeneous and interestingColour :
limited effect on FPD , but ... on behaviour (yellow: promotes
walking; blue: promote sitting and standing; green: promotes
intake, ... ) Intermittent > day - night: drier litter, less
FPDAfter a long dark period: peak in water intake!
Light
Effect of lighting regime on FPD
*
(De Baere & Zoons, 2004)
But if TL lamps are placed higher, a more homogeneous light
distribution, better spreading of broilers and litter ... less
FPD
Light
Grafiek1
51.636.811.60
56.136.86.80.4
5237.710.10.3
41.941.715.70.6
Score 0
Score 1
Score 2
Score 3
Blad1
Score 0Score 1Score 2Score 3
Bulbs 5 lux51.636.811.60
Bulbs 10 lux56.136.86.80.4
Bulbs 20 lux5237.710.10.3
Fluorescent (TL)41.941.715.70.6
Effect of lighting regime on FPD
*
(Van Harn, 2009)
FPD scores
Light
18L:6DIntermittent: 4L:4D: 3L:1D:3L:1D:3L:1D:3L:1DWeight, d 35FCR2029 a1.5722061 b1.566Water/feed ratioDM litter (%)1.68 b58.6 a1.65 a61.2 b
Grafiek1
61.435.82.8
50.742.37
Score 0
Score 1
Score 2
Blad1
Score 0Score 1Score 2
Intermittent61.435.82.8
Day/night50.742.37
Effect of stocking density on FPD
*
EC regulation: 33 or 39 or 42 kg/mNot always clear in trials ...
but faecal load on the litter increases with increasing densities
After an early and partial depopulation ( at d 30): increased
litter quality
FPD scores
(De Baere & Zoons, 2004)
Stocking density
Grafiek1
39.737.220.12.9
54.329.714.21.8
Score 0
Score 1
Score 2
Score 3
Blad1
Score 0Score 1Score 2Score 3
20/m39.737.220.12.9
16/m54.329.714.21.8
Comparison of 2 temperature schedules and FPD
*
(Van Harn & De Jong, 2012)
Temperature
Age (days)Rapid declineSlower decline-5-4-3-2-10171421283542---2830333328252221201925253030333333302825222019
Effect of temperature scheme on FPD
*
(Van Harn & De Jong, 2012)
Temperature
Control (rapid) temperature declineSlow temperature declineWeight, d 35FCR21081.566 a21081.536 bWater/feed ratioDM litter (%)1.75 a65.5 b1.79 b67.0 a
Grafiek1
86.211.22.6
69.123.57.4
Score 0
Score 1
Score 2
Blad1
Score 0Score 1Score 2
Slow decline86.211.22.6
Rapid decline69.123.57.4
Effect of age, breed, gender on FPD
*
Age (weight): clear increase of severity and prevalence with age
(of litter quality??Between standard commercial breeds: no clear
differences, sometimes Ross 308 less sensitive compared to Cobb
FFHowever: slower growing breeds (more active ?): less FPDMales
> females: weight effect?
Animal
FPD and feeding
*
All dietary factors that increase water consumption: risk
factorsOversupply of nutrients (excretion with water via the
kidneys)High dietary protein contentMinerals (Na, K)Fat (source
content), highly condensed feedsRaw materials with high NSP
content, whole wheatFeed form: mash pellet; particle size: coarse -
fineAdditions (Zn, Biotin, clay minerals, lignocellulose...)
...
N- retention in broilers
*
Inefficient: only 40% converted to muscle tissue in broilers
Undigested N: draws water for excretion through liver, kidneys
(uric acid) and faeces Stimulates water intake and urine volume If
excess: disturbs microbial gut balance, absorption 2% CP = 12,5% N
= 18% N excretion (Collett, 2012) Because of the high growth and
high breast meat %: high N (AA) requirements Duality : maximize
growth or gut health Vegetable protein sources: high content of
non-digestible CH (SBM 12%)) Avoids an excess of indigestible
protein by:Using well digestible sourcesSynthetic AA
Oversupply
Effect of protein level and source
*
Effect on severe lesions at d 54
H
L
VEG + ANI
VEG
P
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