I am a new dog owner of a 5 month old black lab. When he was about 3 months his lower eyelid became red and droopy. I took him in to the vet and he gave me drops to see if it was allergies. That didn't seem to do anything and I took him back a third time and they said he just has red, droopy lower eyelids. Has anyone else experienced this or have any suggestions of what it might be? ???