Enables growth hormone receptor binding activity. Acts upstream of or within several processes, including mammary gland development; negative regulation of receptor signaling pathway via JAK-STAT; and positive regulation of neuron differentiation. Predicted to be located in cytoplasm. Predicted to be part of phosphatidylinositol 3-kinase complex. Is expressed in several structures, including lung; primary sex cord; retina; and ureteric tip. Human ortholog(s) of this gene implicated in endometrial cancer and ovarian carcinoma. Orthologous to human SOCS2 (suppressor of cytokine signaling 2). [provided by Alliance of Genome Resources, Apr 2022]