Abstract: An improved animal pet medical collar is provided which comprises a self-supporting solid resilient foam body having a doughnut shape formed by a peripheral, generally annular wall defining a central opening adapted to fit around the neck of an animal pet. The wall is wide enough to prevent a pet wearing it from mouthing a part of the pet's body and thus injuring itself by pulling stitches, licking wounds, etc. The body wall has a pair of spaced opposite ends bridged by a drawstring anchored to one of the ends and passing through the other end to the outside of the body, against which it is releasably locked by a spring clamp or the like. The clamp can be a pair of spring-biased tubes with alignable transverse, drawstring-receiving openings. The drawstring can include a spring or be formed of stretchable material. The drawstring can also include an alarm actuable by excess drawstring tension.