A suggested deworming program begins with doing a fecal exam in the spring to see what parasites you may be dealing with. A variety of dewormers may be used - such as Ivomec (cattle-injectible), Valbazen (paste), Panacur (paste), or Synanthic. A small herd may be treated 3-4 times a year, a medium to large size herd 4-6 times a year. If your farm has a number of visiting animals in and out for outside breedings, 4-H animals coming and going, or crowded pastures, it may be necessary to use a more aggressive deworming program. If you are in a white-tail deer area, you may want to deworm monthly with Ivomec as a preventive. It is recommended to not deworm females during the first 60 days of pregnancy or 60 days prior to birthing. Some breeders report pre-mature births and abortions possibly due to the stress of deworming or even the medication. It is convenient to give dewormers to females after they have given birth but before they have been bred again. It has been suggested to deworm crias for the first time at 10-12 weeks of age. Verify the type of dewormer for your area and correct dosages with your own veterinarian. (also see Parasites). More on deworming.