Choosing to euthanize a beloved pet may be an emotional decision, but it's one that you can make without worrying about causing your dog any additional pain. The solution that veterinarians administer during the euthanasia procedure is specially formulated so that it does not hurt your dog, making the procedure physically painless except for a small prick of a needle.
The euthanasia formula is injected intravenously, and the only part of the procedure that your dog may find uncomfortable is the moment that the vet inserts the needle. When she injects the formula, it cuts off nerve transmissions, quickly and painlessly preventing your dog from feeling physical pain. He quickly loses consciousness, falling into a deep sleep before he stops breathing, goes into cardiac arrest and passes away. Once the formula is injected, your dog feels no pain, and doesn't suffer through the procedure at all.