Feeding fish to snakes. Parasites/worms?
 

I've heard from a few guys to never feed live fish to your snakes because they could carry worms or parasites and it's a quick way to kill the snake. I just got some garters and didn't know the best way to go about this? Feed frozen/thawed fish, live fish, a certain kind of fish, human consumption fish.

Also if human consumption fish, does it matter if fresh or salt water species of fish? Like a garter isn't gonna obviously eat tuna in the wild. (An no I wouldn't give my garter a good fish like tuna to eat, it's just an example)

Matt, I have not done extensive research on the matter. Many, but not all, parasites are somewhat host specific. It's unclear to me which parasites could be a risk for transfer, but it's a good idea to periodically run fecals on your snake as the snakes do not always pass things like coccidia at all times. Additionally, some fish species will not be healthy to be fed, live or f/t. You can purchase frozen silversides at petco and they have worked well for me to feed to fish eating snakes f/t from tongs.