Creep feeding young spring-born lambs is a good option for producers who have low quality forage or limited grazing for their flock.
Liz Genever, Eblex senior livestock scientist, says lambs fed with creep or other supplementary feeds should finish quicker and as such be marketed sooner, prior to the traditional price drop which occurs later in the season.
“Data gathered during the Eblex-funded sheep key performance indicator (KPI) project has found lambs on well-managed, re-seeded grazing can match the performance of lambs supplemented with creep feed on permanent pasture.
“If there is a plentiful supply of high-quality grass available, ideally a sward height of 4-6cm, creep feeding will not improve performance, only add cost. Strategically feeding creep to some management groups can compensate for grass quality rather than feeding to all lambs.”
Dr Genever says good feed conversion efficiency (FCE) is essential to cover the cost of concentrates and can vary from 5:1 to 10:1.
“A sensitivity analysis will show how FCE and concentrate costs can affect the concentrate cost per kg of liveweight gain and whether feeding is viable. Younger lambs convert feed more efficiently which makes introducing feed earlier more economical.”
|Feed Conversion Efficiency|
|Creep price (£/tonne)||Feed conversion efficiency (kg gain: kg concentrates)|
Dr Genever says lambs introduced to creep during the first two to three weeks after turnout can be expected to eat 40-50kg per head by sale if it is offered ad-lib and the sward height is around 4cm. “Lambs on restricted grazing with limited creep feed will gain on average an extra 1kg liveweight for every 5-6kg of creep feed compared to un-supplemented lambs.
“Older lambs must be introduced to creep very carefully with a gradual increase to avoid gorging and dietary upset. Forward creep grazing, where lambs are given access to the best grazing before the ewes, can be used to prevent the need for creep feeding.”
Creep feed can either be purchased as small pellets or a coarse mix. A home-mixed ration based on whole barley and 15 per cent soya bean meal is also suitable (ME = 12.5MJ/kg DM). For long-term feeding, a mineral suitable for lambs should be included at a rate of 2.5 per cent with no added phosphorus, magnesium or copper.