Not likely. Predators generally don't go looking for a fight. If they get injured, they can't hunt and will go hungry until healed up or die.
IF your dogs chase the coyotes away and one gets out front or lags behind, then that dog is subject to attack. Coyotes will also use a female in heat to lure a male dog out, then attack and eat him.
Are your dogs securely fenced in to prevent them from leaving your property?