The proportion of cats with anaemia (RBC ⩽4.21 ×1012/l), CREA >250 μmol/l, ALT >455 U/l, AP >315 U/l, BILI ⩾35 μmol/l and TT4 > reference interval (RI) was compared between PD and WD cats. This evidence concerns the gene GPT and anemia (phenotype).