The occurrence of foxtail in pastures and hay fields seems to be higher this year than in years past. The weather we have had this season could be the cause.
DO NOT feed foxtail infested hay to horses, cattle, or other livestock. The awns can become impelled in the gums and tongue. These can get infected and ulcerated.
Here is a link for identification and control of Foxtail by Dr. Patrick McCullough.
Below is a picture of the consequences, the photo is of some gingival lesions in a horse (photo credit Dr. Lisa Williamson, UGA Vet School.)