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Method for increasing feed efficiency in animals

  • US 5,234,694 A
  • Filed: 09/02/1992
  • Issued: 08/10/1993
  • Est. Priority Date: 07/11/1990
  • Status: Expired due to Term
First Claim
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1. A method for increasing the feed conversion efficiency of a hog, wherein the method comprises:

  • (1) admitting into the hog a dispenser comprising;

    (a) a first wall section comprising a wall that surrounds an internal compartment and an open end, the wall comprising a composition that is substantially impermeable to the passage of fluid;

    (b) a second wall section comprising a wall that surrounds an internal compartment and an open end, the wall comprising a composition permeable to the passage of fluid, wherein the open end of the first wall section and the open end of the second wall section are in mated contact;

    (c) a rigid sleeve extending from the first wall section to cover the junction of the first wall section and the second wall section and to at least partially cover the sides of the second wall section, the inside diameter of the sleeve being greater than the outside diameter of the second wall section, and the sleeve being able to resist transient mechanical forces of at least about 2 kilograms force;

    (d) a porcine somatotropin for increasing feed conversion efficiency in the compartment comprising the first wall section;

    (e) at least one expandable driving member in the compartment comprising the second wall section for pushing the porcine somatotropin from the dispenser; and

    (f) at least one exit passageway for delivering the porcine somatotropin from the dispenser;

    (2) allowing fluid to be imbibed through the permeable second wall section of the dispenser for causing the expandable driving member or members to increase in volume; and

    (3) delivery the porcine somatotropin to the hog by the driving member or members increasing in volume, thereby pushing the porcine somatotropin through the exit passageway to the hog at a controlled rate over a prolonged period of time for increasing the feed conversion of the hog.

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