That can be a great way in some areas. I tend to forget this for small/beginning hobby breeders because in CA the barrier to entry is insane because you need a CA business licence to vend at shows and that requires a bare minimum of $600 in taxes and fees before you have made a cent of profit, and that's before the cost of the table. If you live somewhere a little more hospitable for small business, definitely worth giving that a shot if you have enough animals to sell at once.