A case of disputed paternity in dogs is reported. DNA examinations were carried out from hair samples of the individuals several months after the death of the putative sire. Ten short tandem repeat (STR) loci were analysed by fluorescence-labelled multiplex PCR using ABI PRISM 310 Genetic Analyser. Based on the results the candidate sire was included in the pedigree records as the biological sire. In spite of the genetic homogeneity of pedigree dogs due to inbreeding, canine microsatellites can provide an adequate basis for assigning paternity in pure breeds.