EXHIBIT 11.1 ------------ Synbiotics Corporation Computation of Earnings (Loss) Per Share - -------------------------------------------------------------------------------- Three Months Ended Nine Months Ended September 30, September 30, ----------------------- ----------------------- 1997 1996 1997 1996 ---------- ---------- ---------- ---------- Primary Earnings (Loss) Per Share: Net income (loss) per statement of operations $ (120,000) $ (395,000) $ 725,000 $2,773,000 ========== ========== ========== ========== Weighted average number of shares outstanding 7,790,000 6,000,000 7,759,000 6,013,000 ========== ========== ========== ========== Primary earnings (loss) per share $ (.02) $ (.07) $ .09 $ .46 ========== ========== ========== ========== Fully Diluted Earnings (Loss) Per Share:/(1)/ Net income (loss) per statement of operations $ (120,000) $ (395,000) $ 725,000 $2,773,000 ========== ========== ========== ========== 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 7,790,000 6,000,000 7,759,000 6,013,000 Add-effect of outstanding options (as determined by the application of the treasury method) 255,000 153,000 10,000 26,000 ---------- ---------- ---------- ---------- Weighted average number of shares, as adjusted 8,045,000 6,153,000 7,769,000 6,039,000 ========== ========== ========== ========== Fully diluted earnings (loss) per share $ (.02) $ (.06) $ .09 $ .46 ========== ========== ========== ========== /(1)/ This computation is submitted, for the three months ended September 30, 1997 and 1996, 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-