SerestoLarge Dog Vet-Recommended Flea & Tick Treatment & Prevention Collar for Dogs Over 18 lbs. | 2-Pack

why does it say that you are not to sleep with your pet? If they can eat it with no side effects//

can i wear this? i am a humanoid.

what is the weight for a large dog collar?

Do these really work? My dogs are outside all the time, day and night, on a farm and fleas are a terrible problem. Nothing non prescription works.