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Brain Research Bulletin|May 24, 2008
Breed-specific companions--inter-individual distances reflect isolating mechanisms within domesticated chickens (Gallus gallus f.d.)Inga Tiemann, Gerd RehkämperPlos One|August 11, 2012
Evolutionary pets: offspring numbers reveal speciation process in domesticated chickensInga Tiemann, Gerd RehkämperScientific Reports|June 19, 2024
Domestic chickens solving mirror-mediated spatial location tasks uncovering their cognitive abilitiesSonja Hillemacher, Inga TiemannPoultry Science|December 20, 2025
Beyond productivity: Investigating keel bone fractures and welfare issues in the British dual-purpose breed IxworthSenta Becker, Wolfgang Büscher, Inga TiemannAnimals : an Open Access Journal From MDPI|October 31, 2020
Are Dual-Purpose Chickens Twice as Good? Measuring Performance and Animal Welfare throughout the Fattening PeriodInga Tiemann, Sonja Hillemacher, Margit WittmannAnimals : an Open Access Journal From MDPI|April 3, 2021
Welfare-Related Behaviors in Chickens: Characterization of Fear and Exploration in Local and Commercial Chicken StrainsVerena Meuser, Leonie Weinhold, Sonja Hillemacher, et al.Plos One|October 25, 2023
Roosters do not warn the bird in the mirror: The cognitive ecology of mirror self-recognitionSonja Hillemacher, Sebastian Ocklenburg, Onur Güntürkün, et al.Animal Cognition|October 19, 2004
Do chickens (Gallus gallus f. domestica) decompose visual figures?Christian W Werner, Inga Tiemann, Julia Cnotka, et al.Brain Research Bulletin|May 24, 2008
Unusual brain composition in Crested Ducks (Anas platyrhynchos f.d.)--including its effect on behavior and genetic transmissionJulia Cnotka, Inga Tiemann, Heiko D Frahm, et al.Plos One|January 26, 2024
Presence of keel bone damage in laying hens, pullets and roosters of local chicken breedsLisa Jung, Sonja Hillemacher, Inga Tiemann, et al.Pageof 2