Although not signed, the illustration of this poster is due to the renowned animal artist Joan LLAVERIAS. The same illustration, if signed, appeared in the magazine "En Patufet" no. 1431 (September 5, 1931
A photographic plate is a photographic support consisting of a glass sheet covered with a light-sensitive emulsion. The glass plates were used as a support before the photographic film. A light-sensitive emulsion was applied to a glass plate.
The compound feed is a food prepared for animals which, according to European legal regulations, is: "Any substance or product, including additives, intended for the oral feeding of animals, whether it has been completely or partially transformed or no ».1