Hematopoietic cells in bone marrow smears (B) show a mildly increased proportion of granulocytes and a decrease of erythrocytes, while the percentage of middle–late stage erythroblasts (small round cells with dark blue nuclei) show a mild increase within the erythrocyte series.

<p>The sample was taken from a dog treated with 6⁻¹ ARM i.m. for 13 weeks. (Stained with Wright’s stain and imaged with an oil immersion lens, 1000×.)