Table 4.

Mean ± standard error (s_χ̄) serum cortisol concentrations (nmol/L) of calves immediately before dehorning (time 0), at 3 and 6 h after dehorning, and changes in serum cortisol concentrations between 3 and 0 h and 6 and 3 h after dehorning in control and ketoprofen-treated calves

	Treatment
Time (h) after dehorning	Control	Ketoprofen
0 to 2	68.4, sχ̄ = 14.3	87.0, sχ̄ = 12.7
3	86.3, sχ̄ = 18.2	64.8, sχ̄ = 12.1
6	96.9, sχ̄ = 19.6	111.1, sχ̄ = 10.7
0 to 3	17.9, sχ̄ = 12.9	−22.2, sχ̄ = 14.0a
3 to 6	10.6, sχ̄ = 16.1	46.3, sχ̄ = 14.4

^aIndicates significance at P < 0.05