For many years I kept a salt block in the forest by my cabin. Deer would use it day and night through the spring to mid-summer, then use would fall off. Other animals like snowshoe hare, mountain cottontail, coyote, porcupine and raccoons would go to it.
Many birds use salt too, especially finches like Cassin's Finch, Red Crossbill, Pine Grosbeak, Evening Grosbeak and Pine Siskin. Also Mountain Chickadees, Red-breasted and White-breasted Nuthatches, Downy and Hairy and Three-toed Woodpeckers, Steller's Jays, and sometimes Dusky Grouse would use the salt.
There are studies that show birds that eat road salt are often killed by auto traffic because the salt slows their metabolism and their ability to escape oncoming cars. I stopped putting the salt blocks out partly because we had two separate auto-deer fatalities where deer crossed the highway to come to our forest where the salt was. Also I no longer live there full time to get the advantage of watching activity at the salt block.
-consider the impact of traffic in locating the salt lick.
-other deer and animals will find the block so locate it where you can watch from a distance, from a blind, or from inside the house. Also, because other animals will come, your Whitetail buck probably won't bed there much longer.
-I found that deer didn't like the "mineralized" salt blocks, only pure salt.
-by end of summer you might pull out the salt block to preserve it and try corn or pelletized feed to attract them.