SYNBIOTICS CORPORATION EXHIBIT 11.1 ------------ COMPUTATION OF EARNINGS (LOSS) PER SHARE THREE MONTHS ENDED NINE MONTHS ENDED SEPTEMBER 30, SEPTEMBER 30, ------------- ------------- 1995 1994 1995 1994 ---- ---- ---- ---- PRIMARY EARNINGS (LOSS) PER SHARE: Net income (loss) per statement of operations $ (854,000) $ 1,188,000 $ 880,000 $ 323,000 ============ ============= ============ ============ Weighted average number of shares outstanding 5,809,000 5,824,000 5,827,000 5,857,000 ============ ============= ============ ============ Primary earnings (loss) per share $ (.15) $ .20 $ .15 $ .06 ============ ============= ============ ============ FULLY DILUTED EARNINGS (LOSS) PER SHARE:/(1)/ Net income (loss) per statement of operations $ (854,000) $ 1,188,000 $ 880,000 $ 323,000 ============ ============= ============ ============ Reconciliation of weighted average number of shares per primary computation above, to amount used for fully diluted computation: Weighted average number of shares outstanding, per primary computation 5,809,000 5,824,000 5,827,000 5,857,000 ------------ ------------ ------------ ------------ Add-effect of outstanding options (as determined by the application of the treasury method) 54,000 7,000 8,000 ------------ ------------ ------------ ------------ Weighted average number of shares, as adjusted 5,863,000 5,824,000 5,834,000 5,865,000 ============ ============= ============ ============ Fully diluted earnings (loss) per share $ (.15) $ .20 $ .15 $ .06 ============ ============= ============ ============ /(1)/ This computation is submitted, for the three month period ended September 30, 1995, in accordance with Regulation S-B Item 601(b)(11) although it is contrary to paragraph 40 of APB Opinion No. 15 because it produces an anti-dilutive result. -1-