Abstract: A muscle powered liquid dispensing insert is provided for use with an implanted anchor having a hollow anchor sleeve extending into the subcutaneous fascia of a region behind an animal's ear. The insert includes one or more balloon-like reservoirs, each containing a drug or other medicant in substantially liquid form. Each reservoir means additionally provides effective means for anchoring the insert in the animal. A pump assembly draws the medicant(s) from the reservoir(s), and dispenses such to the animal. The pump assembly has a toroidal pump body defining a pump chamber and including a flexible impermeable pump diaphragm. The pump chamber communicates through inlet check valve means with each of the reservoirs, and through outlet check valve means with the tissue of the animal. The outlet check valve means operate at a higher activation pressure than the inlet check valve means. A piston powered solely by the animal's muscle and tissue operates the pump diaphragm.

Abstract: An animal insert with analog display is provided for use with an anchor inserted behind the animal's ear into a region commonly known as the Kelly triangle. The region is bounded cranially by the posterior border of the conchal cartilage and caudally by the anterior border of the cleido-occipitalis muscle. The anchor comprises an anchor flange positioned against the animal's skin, a sleeve extending into the animal and having internal threads engaging corresponding external threads on the insert, and a healing material and a plurality of barbs for retaining the anchor in the animal. The insert comprises an insert flange positioned adjacent the anchor flange, a tube extending into the animal through the sleeve of the anchor, and one or more capsules or pellets of a dissolving medicant-containing material or a liquefying diagnostic material disposed within a lower end of the tube.

Abstract: An animal information means which utilizes a region behind an animal's ear and adjacent its skull composed of skin, sub-cutaneous fascia and fat in which is formed a cavity, the temperature in the cavity being indicative of the animal's body temperature; the attachment including a temperature actuated warning assembly sensitive to a fever temperature in the animal, the warning assembly having a flanged end arranged to produce a conspicuous visual signal, the warning device being removably received and secured in a retainer assembly adapted to be inserted in the cavity, the retainer having an outer flanged end forming an exposed disk and an inner expansible end, the flanged and expansible end serving to clamp the fascia and skin surrounding the cavity; the retainer also being arranged to receive and secure a shield or guard underlying the flanged end of the retainer and projecting laterally beyond the warning assembly to prevent the surrounding hair growth from covering the warning device, the guard also servi