GB/T39759-2021 crude fiber 11.18 crude protein 11.16 0 defensive behavior…… 14.11 depressic0 n behavic0r…… 14.23 disease diagn0sis… 8.6 disease prevention..........................8.5 disease treatment 8.7 d0g…“ ……36 drape 16.12 drinking water 12.10 dry matter …11.15 duck …3.8 embryo cryopreservation 13.11 embryo implantation……… 13.10 emotion test …… 14.24 end0 f the experiment……16.28 environmental enrichment …15.7 ethical review …15.4 th0l0gy…………………… …14.1 ethology experiment…**……………… ……4.3 euthanasia………. 8.4 euthanasia equipment 12.20 experimental animal nutritic0n……………………………*……………………… 11.11 exploratory behavior 14.7 extruded feed 11.6 facility for animal breeding…………… 12.8 fasting… 16.14 fearful behavic0r………………………… 14.20 feed additive……… 11.19 feed label 11.28 feed producing unit 11.31 feed product quality tracing ............... 11.29 feed product recall…… …11.30 feeding equipment … 12.17 ferret……………………… 3.14 34