These flea collars, though rechargeable with solution, usually just work around the neck. They help prevent, but not as much in treatment of fleas.

Pros: Works a little

Cons: Just works a little

Flea collars are useless - just gives the impression you are taking care of fleas - in reality, you may be doing harm to your pet! Go to your vet and get the right stuff!

Pros: none

Cons: doesn't work

Flea collars can get caught and cause discomfort for your pet. Many pets have serious skin reactions to a flea collar. There are safer alternatives to this flea collar.

Pros: May kill a few fleas

Cons: Harmful to pets