you may not need to get rid of them
"
[FONT=Helvetica, Arial, sans-serif]Diet/Feeding: [/FONT]
[FONT=Helvetica, Arial, sans-serif]The turkey vulture, contrary to popular belief, does not feed strictly on carrion (though carrion forms the bulk of its calories). This species has been recorded eating a wide variety of food, including wild and domestic carrion, stranded mussels, shrimp, grasshoppers, mayflies washed onto shore, rotten pumpkins, palm fruit, grapes, juniper berries, and feces of coyote and sea lion. [/FONT]
[FONT=Helvetica, Arial, sans-serif]The Turkey Vulture soars above the ground for much of the day, searching for food with its excellent eyesight and highly developed sense of smell. Turkey vultures not only find food individually when foraging, but also may notice when other vultures in flight begin to descend to food and then follow those vultures to the food source. [/FONT]
[FONT=Helvetica, Arial, sans-serif]Extremely unaggressive and non-confrontational, the turkey vulture has only rarely been documented to feed on still-living prey, an occasional habit of its more aggressive cousin, the black vulture. Known instances of turkey vultures preying on live animals involved trapped, extremely weak, or helpless prey, such as ruffed grouse chicks and trapped or anesthetized birds. Turkey Vulture Society officer Brandon M. Breen has seen turkey vultures in the Falkland Islands feed on wild goose eggs as well as birthing sheep that were too weak to stand up. Such predatory behavior is believed to be exceedingly rare in this species, and live animals that are mobile (e.g., pet dogs) are not believed to face any risk. [/FONT]
[FONT=Helvetica, Arial, sans-serif]Turkey Vultures can often be seen along roadsides, cleaning up roadkill, or near rivers, feasting on washed-up fish."[/FONT]
[FONT=Helvetica, Arial, sans-serif]quote from http://vulturesociety.homestead.com/TVFacts.html[/FONT]
[FONT=Helvetica, Arial, sans-serif]and then this from a post in 2009 https://www.backyardchickens.com/t/183885/do-turkey-vultures-kill-chickens[/FONT]