Talked to a sales rep to day and she was telling me about proheart 6 being back on the market and yes you are correct the vet clinic has to take a class. They are also going to monitor this drug more carefully this time around by having a age class that it can and can't be given to. Can't remember what she said for the age they have to be to get the injection but she also said that they can't be over a certain age either. The dog that is going to have the shot will also need a Complete Blood Count and Chemistry panel ran before the injection to make sure it is healthy. The vet will not administer it either if your dog has had a vaccination within 30 days. They are doing all this to make sure if your dog has a reaction they know where it is coming from. If your dog had a vaccination and the proheart inj on the same day and there was a reaction they wouldn't know which one cause the reaction, hence doing them at different times and monitoring the animal. The blood work is done one time before the injection. She said alot of vets are happy it is back on the market. She hasn't heard of any problems so far. We are probally not going to rush right in and get it at our clinic but something to wait and see how it turns out and go from there. We are happy with Interceptor and Sentinel products for now.