IGF1 and chronic kidney disease: Median serum IGF‐1 concentrations of cats with stage 1 (n = 8), 2 (n = 58), 3 (n = 24) and 4 (n = 10) of CKD were 257 ng/mL (range 58–918 ng/mL), 476 ng/mL (range 34–1456 ng/mL), 597 ng/mL (range 123–1055 ng/mL), 571 ng/ml (range 123–948 ng/mL), respectively.