Cyst shedding for G1, G2 and G3 groups at FS1, FS2 and FS3 (cyst counts in log₁₀). FS1: fecal samples collected 0–4 days before initiation of treatment, FS2: fecal samples collected 2–4 days after the end of treatment, FS3: fecal samples collected 8–10 days after the end of treatment, G1: dogs with reduction of cysts ≥ 90% between FS1 and FS2, G2: dogs with reduction of cysts ≥ 50% and <90% between FS1 and FS2, G3: dogs with reduction of cysts < 50% between FS1 and FS2, DFA = direct immunofluorescence assay, *: significant reduction in cyst shedding compared with FS1.