Rattlesnake vaccines are available and are very important for dogs that are at risk.  Dogs that hike, play, or live in areas where rattlesnakes can be found are at risk. Rattlesnake bites are very serious and can result in serious injury or death. Treatment of rattlesnake bites must begin right away and may include antivenom injections which are very expensive. A dog that is protected by the rattlesnake vaccine must still get medical attention as soon as possible, but treatment will not be as extensive as it would be without the vaccine. Vaccinated animals are less likely to be left with  any permanent damage. The first vaccination requires a booster in three weeks and then a booster every six months due to the long rattlesnake season in Phoenix, AZ.