Nihon Nohyaku Co., Ltd.

Akio Hokazono

Tatsuyoshi Sugimoto

Masahiro Hayashi

Takehiro Shimada

Masahiro Shimosako

A pharmaceutical composition for prophylactic and preventive of ketosis of livestocks which contains a dithia derivative represented by the general formula (I), ##STR1## wherein R and R' may be the same or different and are each individually a lower alkyl group, n is an integer of 0, 1 or 2; and A is a group of the formula, --CH.sub.2 --, ##STR2## (wherein M is a hydrogen atom or a salt-forming residue), --CH.dbd.CH--, --CH.sub.2 --CH.sub.2 --, ##STR3##

Pharmaceutical composition for prophylactic and preventive of ketosis of

Feed compositions containing a dithia derivative represented by the general formula: ##STR1## wherein R and R' are same or different lower alkyl groups, n is an integer of 0, 1 or 2, and A is --CH.sub.2 --. ##STR2## (wherein M is hydrogen or a salt-forming residue), --CH.dbd.CH--, --CH.sub.2 --CH.sub.2 --, ##STR3## are useful for improving meat qualities of livestock, poultry and fish as well as for strengthening the eggshell of poultry.

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Yokohama, Japan

Akio Hokazono