A team of five University researchers in Germany assessed the quality of heat supply from 11 different creep heating arrangements. Radiant heaters needed the most effective energy. Power required for underfloor heating by electricity was about 1/3 lower than for the warm water panels. Cost for heating is not the only consideration, as efficiency in terms of energy use is not always best for the pig. The better the heat supply, the more time piglets spend lying on their side. A graph of ideal lying behavior and average piglet weight gains on the heating system tested is discussed.