PennHIP (an acronym for "University of Pennsylvania Hip Improvement Program") is a diagnostic technique for evaluating the hips of dogs for laxity. The acronym is also used for the network of veterinarians that use the PennHIP method of evaluation, and for the database of breed-specific hip dysplasia trends maintained at the University of Pennsylvania. PennHIP's main objective is "to reduce the frequency and severity of hip dysplasia in all breeds of dogs", to quote the official website. The PennHIP method of diagnosis consists of three radiographs taken from different angles, which are then analyzed in order to make an assessment.
References
PennHIP Wikipedia(Text) CC BY-SA