How many injections are needed to contracept a deer?
A new one-shot vaccine has shown effectiveness in blocking fertilization in horses for one year and is being developed for deer. Until that one-shot form of the vaccine has been perfected in deer, two shots are necessary the first year and a single annual booster thereafter unless one takes the approach in which as many deer as possible are darted the first year without looking for any significant results for that year and then given a booster the second year. This latter approach produces effective fertility control.
