In this farm, stocking density is rath- er high because pigs have been performing really well.


Table 1 – Effect of stocking density on the voluntary feed intake and growth rate of piglets in the five weeks period, post-weaning.


Stocking density (pigs/pen) Space allocation (m2


/pig)


Feed intake (kg/day) 0-14 days 14-28 days 28-35 days 0-35 days


Growth rate (kg/day) 0-14 days 14-28 days 28-35 days 0-35 days


Table 2 – Effect of stocking rate on performance.


Number of pigs per pen Days on trial


Stocking density (m2/pig) Weight in (kg) Weight out (kg)


Liveweight gain/pig (kg) Liveweight gain/pen (kg) Daily gain (g)


Daily feed intake (g) FCR


9 26


0.165 6.03


15.47 9.44


84.96 363 440


6 26


0.248 6.67


18.71 12.04 72.24 463 481


1.2 1.04


Farm Buildings Investigation Unit. These guidelines are cited as a practical cost-benefit approach, balancing the con- straints of commercial piggeries with the need to achieve high levels of post-weaning feed intake and growth. Table 4 shows the minimum space allowance per pig as per the EU Welfare Regulations (2001). This guideline may be sub- ject to severe criticism because it claims that the 6kg piglet has the same space requirement as the 10kg pig and that the 21kg pig has the same space requirement as the 30kg pig. Clearly this is a compromise which is likely to be detrimental to performance. It is important therefore to remember that these are minimum figures rather than optimum.


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0.55 1.04 1.40 0.90


0.32 0.53 0.67 0.47


Table 3 – Recommended space allo- cation per pig (totally slatted).


Liveweight (kg) m2


5 0.092 6 0.103 7 0.113 8 0.124 9 0.134 10 0.145 11 0.155 12 0.166 13 0.176 14 0.187 15 0.197 Source: Scottish Farm Building Investigation Unit


Table 4 – EU welfare regulations (2001) – space allowance per pig.


Liveweight (kg) m2


6 0.15 8 0.15 10 0.15 15 0.20 20 0.20 25 0.30 30 0.30


12 0.17


0.47 1.01 1.27 0.82


0.27 0.53 0.59 0.43


16 0.13


0.48 0.89 1.11 0.74


0.28 0.42 0.49 0.37


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