My bachelor thesis deals with the difference between goose, duck and eider feather. The main focus is aimed on laboratory testing; therefore no survey was carried out. The research was performed at the company Kamýk Daunen s.r.o., based in Kamýk nad Vltavou. Kamyk Daunen deals with the processing of goose and duck feather for production of feather and down filled products, duvets, pillows and mattress toppers in particular. The theoretical part of this thesis is a study of the following duck and goose species and their down and feather: Peking duck, Czech goose, Snow goose and the Common eider, and the impact of the specific feather and down of these species on human. As well as the production of feather in general. In the practical part we perform laboratory measurements of fat and oil content, humidity, oxidation number, fill power, turbidity and pH when goose, duck and eider feather with different down content are compared. The aim of my bachelor thesis is to write a specialized research on a given topic, summarize notes about the production and acquisition of feather, and to pursue laboratory methods that are applicable in this case. The main aim of the thesis is to discover, which type of feather is most suitable for quality daily sleep. As indicated before, there are several different kinds of feather that are used as a filling material for feather filled products. We have examined the difference between goose, duck and eider feather. As for the goose feather we had used feather from a goose of Czech goose and Snow goose breeds. For duck feather we have opted for the Peking duck and the eider was the Common eider.