After reading reading and more reading. I am in need of medication for my squirrel. She drank her formula to fast last night and the clicking sound was very loud last night. It has gone better and tonight you really have to consentrate to hear it,but it still is there. I am not certain if she has had this mild clicking sound ,but do recall the formula coming out from nose sever weeks ago. I do not want to wait until Monday to get her to a vet, it might be to late. I live in Navarre Florida.