Changes to Standardization Agreements
In the new standardization agreements, there have been several changes to feeding plans and corrected key figures. These changes have been included in the latest versions of PigExpert (PigExpert 7000600).
Feeding Plans:
The new feeding plans have been selectable for some time via the company settings. Starting from version 7000600 (July 2024), each company will be automatically switched to the new plan set for their operation.
This means that if you were on the plan: Boars/Sows 2014, you will be switched to Boars/Sows 2023. The old plans will still be selectable via the company settings.
Corrected Key Figures:
The new corrected key figures have been added to the period overviews.
Under the section Feed Intake/Feed Costs per Delivered Animal, you will now find not only 25-117 kg but also 25-125 kg.
If you want to use these key figures, you need to add them to the overviews yourself.
Calculation Method in PigExpert:
The following calculations are used in PigExpert for determining the results of fattening pigs: growth up to feed costs.
Growth:
For growth, we take
(calculated live delivery weight - rearing weight) / number of lying days.
For calculating the live weight, we use the conversion factor chosen at delivery. If no conversion factor was entered at delivery, we take the conversion factor set in the company settings.
To determine the rearing date and rearing weight of the delivered fattening pigs, we use the LOLI principle (“last out” - “last in”). For LOLI, a so-called "fattening pig inventory" is created, listing all the animals reared per delivery. First, the deceased animals and those with a live delivery weight below 60 kg are linked to the rearing date based on the entered lying day at departure. If the lying day at departure is not entered, the lying day is determined based on the set feeding plan and the entered weight at loss. Animals under 60 kg at departure are linked to the supply according to the LOLI principle if no lying day at departure has been entered.
Next, the present pigs are identified. These are the most recently delivered animals.
For the animals that are no longer present, the departure is linked to the rearing according to LOLI. The most recent delivery is linked to the youngest animals according to the plan. Usually, the youngest animals are the last delivered, but this is not always the case. Age is assigned based on rearing weight. Animals are linked to an age according to the plan based on rearing weight.
Example: A group of animals is reared on June 1 with a weight of 25 kg (plan day 71) and another group on June 8 with a weight of 35 kg (plan day 86). On June 8, the animals from group 1 weigh 30 kg according to the plan (plan day 78). The animals from group 2 are older according to the plan and will therefore be delivered earlier.
Once the correct rearing event is assigned, the number of lying days and rearing weight corresponding to the delivery is known. Based on this, the growth of the delivered pigs is determined.
How LOLI is determined can be found when you have opened an overview under: ··· (three dots in the top right) → Various → Control → LOLI (FIFO).
Company Growth:
To calculate company growth, we look for the last delivery. From the last delivery and the deliveries in the 150 days prior, the company growth is determined. If there are fewer than two deliveries, the set company growth in the company settings is used.
Daily Feed Consumption:
To calculate daily feed consumption, we first determine the consumed feed between the entered stocks (stock 1 + purchase - stock 2). If there is no stock on or after the reference date, 1 kg is always used for the ending stock.
Additionally, all animals present during the period are placed on the theoretical feeding plan. This is based on the set feeding plan in the company settings and the company growth described above. If the pigs have been delivered in the meantime, the actual growth, as determined by LOLI, is used. Based on this growth, the weight of the pigs is determined for each day. This weight is then used to determine the corresponding feed intake according to the plan for each day.
This means that recent historical results regarding feed conversion may still change once more of the present animals from the relevant period are delivered in the future, as then growth could be accurately determined with the associated feed intake. As more animals are delivered, the results from historical periods become more accurate.
When all animals from a given period have been delivered and the feed stocks are no longer adjusted, the results will not change anymore, even if company growth is modified. This is on the condition that feed stocks are regularly entered.
If, during the period between the entered feed stocks, more or less feed has been consumed than expected according to the plan, this difference in feed consumption will be proportionally distributed over the intake per lying day of all present pigs in the period.
This is clearly shown in the tabs Detail / Departure Group and Detail / Day.
Feed in Silos:
The feed in silos on the opening and closing balance is calculated based on the specified stocks and the consumed feed per day. Each day, the calculated feed stock at the end of the day is determined as follows: ending stock yesterday + purchase today - consumed feed today.
For more insight, check the tab Detail/Day in a period overview.
Consumed Feed in Period:
For the consumed feed in the period, we take the feed in silos (calculated) + the delivered feed in the period - ending stock feed in silos (calculated).
Feed in Animals at Beginning and End:
To determine the feed in animals on a date, we look at the daily feed consumed by the pigs as described above. The feed consumed by all present animals up to and including this date is totaled.
This is clearly shown in the tabs Detail / Day. Double-click on feed in animals to see how this is calculated.
Feed Consumed by Deceased Fat Pigs:
The feed consumption of deceased fat pigs is always determined based on the set feeding plan according to the entered lying day.
Feed Consumption of Delivered Fat Pigs:
For the feed consumption of the delivered pigs, we take the opening balance of feed in animals + the consumed feed in the period - the feed consumption of deceased fat pigs - the ending balance of feed in animals.
The feed consumption per delivered pig is the total consumption of the delivered pigs divided by the number of delivered pigs.
To view this per departure group, go to the tab Detail / Departure Group. Double-click on a line to make it clearer.
Feed Conversion:
The feed conversion of the delivered fat pigs in the period is calculated based on the consumed feed of the delivered fat pigs and the growth of these fat pigs: Feed consumption of delivered fat pigs / Growth of delivered fat pigs.
Feed Costs:
To determine feed costs, we first calculate the average feed price in the specified period: (Total consumed feed in period € / Total consumed feed in period KG). This feed price is then multiplied by the consumed feed per delivered fat pig (Total feed consumption / number of delivered fat pigs).
(These formulas are also visible on the period overview in PigExpert when you hover your mouse over the key figure.)
Corrected Key Figures:
To determine the corrected key figures, we calculate the ratio between 1. the standard growth path of 25-125 kg and 2. the growth path between the actual rearing weight and the delivery weight according to the plan.
(25_125) / plan (actual rearing weight - actual delivery weight).
Based on this ratio, we determine what the corrected results are from the actual results.
Example Growth:
125 kg delivery weight - 25 kg rearing weight / 115 days (according to plan) = 869 grams growth.
Actual weights:
122 kg delivery weight - 30 kg rearing weight / 103 days (according to plan) = 893 grams growth.
869 / 893 = 0.973.
Actual Growth:
122 kg delivery weight - 30 kg rearing weight / 97 days (actual) = 948 grams actual growth.
0.973 x 948 = 922 grams corrected growth.