THE Macau Canidrome sells off another 20 greyhounds tonight but a change in the format of the popular bi-monthly auctions is coming shortly. Up until now, the auctions have been run on similar lines to other countries where an interested buyer attends, bids and, if he puts up enough hard cash, walks away with the greyhound of his choice. Although turnover has been good and virtually all dogs sold, Canidrome officials are concerned that not nearly enough members are getting a chance at the dogs. They will now introduce a sealed tender format so that, for example, Hongkong-based owners need not physically attend the auctions. ''Tenders will be opened on the night and the highest one will get the dog. In case of equal amounts, then lots will be drawn,'' said kennel manager Brian Murphy. ''We think it will prove much fairer and have a wider appeal to all our members,'' he added. Meanwhile, officials are cock-a-hoop over totalisator turnover in recent weeks - despite direct clashes with meetings at Taipa racecourse. The Macau Jockey Club (MJC) held their second Thursday meeting recently and had their special twilight meeting last week. Canidrome officials were wary about these developments but need not have worried - as totalisator figures confirmed. Chief official Danny Osmund said: ''We have had very few direct clashes with the MJC in the past and those tended to be overlapping, where they had a twilight meeting which ended after we had run off a race or two here. ''But it was direct clash on a Saturday night and, even more significantly, on a Thursday night. ''Saturday night is traditionally our best night of the week but we always tick over nicely on Thursdays, too. It's not that we are concerned about competition, let's face it not everyone who likes dogs will go punting on horses. ''As it was, our turnover was not out a dollar. In fact, on the Saturday night in question we did slightly more than the previous two weeks. It was all very encouraging,'' he added. And last weekend there was cause for quiet celebration as the two-day turnover exceeded the $3 million mark.