Zobrazeno 1 - 1
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pro vyhledávání: '"Isabelle C. Pettersson"'
Publikováno v:
PeerJ, Vol 5, p e4069 (2017)
Background Laying hens are often kept in barn or free-range systems where they must negotiate level changes in the house to access resources. However, collisions and resultant keel fractures are commonplace. Producers sometimes add ramps to make rais
Externí odkaz:
https://doaj.org/article/dd51f1d0ec204dc58b05c7c1e1aff316
