If you scroll down the general page "www.caudata.org/forum" a bit, you'll find a part dedicated to axolotls.
If you ask your question there, you've got a bigger chance of getting an answer from others who keep axolotls.
My axies eat live fish. I breed goldfish, and used to breed feeder fish for that purpose. I switched to goldfish, because my larger axies needed something bigger. My axies will even hunt the fish by themselves at night. The younger ones seem to enjoy it.
yeah, breeding fish can be hard. Some fish just don't seem to want to do it. lols
Other than the goldfish, I've only ever fed mine feeder fish. (oh, and one of my axies ate my suckerfish, but that wasn't meant to happen). Wouldn't really know what other types are safe.
I still feed mine bought fish when I don't have any myself, but I have to be careful of where I get them from. I always get them from the same place, where I also get live fish for my Oscars.
Qaurantining and medicating the feeders might also work, (but I really wouldn't know, as I've never done that before).
i had some black molly.. they are very easy to make babies.. just put a female n a male together and the babies come out ! hehe.. but they are very slow growing.. so if you wanna feed ur lil axos then theyre ookai..
mine are scared of fish!! i never feed them feeders due to the fact i cant be bothered breeding goldfish and guppies are too annoying plus if i give some to my axies frank (my huge oscar) will want some too. i just cant bring myself to give them some, i did once to try and get the axie i just saved to eat but ended up feeling sorry for them lol, im such a softie!!
my axolotl love to eat fish. i give them every now and then like 1-2 times a week. its really funny the way he gets them though, he sets it all up for the big ambush he'll go into his cave and stick his head out just a bit waiting untill the fish swim about 3 cm away from his head then he'll dart out and eat them. its so funny when there inside his mouth coz you can see his head shaking when they try to escape then you see this little squirt of blood come out then he swallows it. i think it looks awesome when he does it. very intelligent creatures!
My guy is about seven months old, but for a while i was feeding him feeder guppies, and he loved them. lol, they would just mysteriously disappear during the night. I ended up with four adults, that just kept reproducing, so my guy was very happy. I never saw him actually catch one, but one day i came home, and there was an eye ball staring out at me from his belly. it was very strange....
lol, i'll get him some more when het gets bigger, but right now i think he's still rather small, so he's off of them for a bit.