An annular collar 10 for animals is comprised of an elongated band having a top member 12 and a bottom member 14. Support structure 16 is carried between top member 12 and bottom member 14 and space top member 12 and bottom member 14 apart defining first edge 17a and second edge 17b. Support structure 16 defines side passages 22 having side openings in communication with first edge 17a and second edge 17b. Side passages 22 communicating with insect controlling chemical 20 which is disposed within collar 10.
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