this weekend there were some forrest fires in Mexico and the winds were channeling the smoke over Texas as per the Houston news report...thhe smoke might of caused the signal strength for the Garmin to drop off some especially in the woods and thick cover...Just throwing that out there as a possibility...
I wonder if having wireless internet on my cell phone and using it while using the Garmin if that will cause interferance between the reciever and collars (Garmin)...