system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can't the prison system agree on a "painless" execution method, when any veterinarian in the country can painlessly put down a dog?
gpt
Part of it is, it's getting increasingly more difficult for states to get the drugs necessary. Some drug companies will not sell the drugs to states if they know it will be used in executions. 

If the states could get all the drugs they need for an execution, instead of having to alter the process, or use off-label drugs, it probably would be as painless as a euthanized animal. There is a reality that some people don't want the state to execute people and trying to make it difficult for the state to do so.