BJH had some great sites heres the links
In regards to heartworms, please read the following information and you will understand my feelings on this.
http://quikonnex.com/channel/item/13049 http://www.nbc5i.com/family/3345322/detail.html http://www.theherbsplace.com/Heartwo...on_sp_104.html
me being in the south I will keep doing heartworm meds, if I was north I would really think twice about it.