Suspected Lonely Mouse Syndrome as a Cage Effect in a Drug Safety Study

Table 2

Variability of ocular scores for drug-free (Control) animals in Trials 1 and 2.

Ocular score	Trial 1	Trial 2
NOA: number (%)	82 (85.4)	104 (72.2)
Eyes closed: number (%)	13 (13.6)	40 (27.8)
Crusty secretions: number (%)	1 (1.0)	0 (0)

; no observed abnormalities.