Put my lic heat detectors on the cows on Sunday afternoon ready for start of service on Monday. All went on really well and stuck to the cows no problem. Ive used theses heat detectors for years now so nothing new to me. 8 had no heat detector on this morning and there must be about another 20 this afternoon. Walked the field to see if they had fallen off but cant see any! Where have they gone? Could a cow be eating them!? Never had this issue and used kamars or lic type kamars for over 10 years now.