if another one of ur axolotls died from starvation i suggest its time you change things up. here are my personal experiences with regurgitating axies.
an axolotl i take care of started spitting out all the earthworms (1/4th pieces) i gave it for about a week. it usually was out within 10 seconds to 3 minutes, so not as long as urs keeps it down. what i realized was #1 the smaller the better. even if it seems like ur axolotl is big enough to handle it try even smaller. mine is 5-6 inches and now i feed them 1/6th pieces, 1/4th if its a smaller wiggler.
#2 sometimes they dont like to eat from a tong, now u didnt mention whether u just drop in the food or feed him/her personally with a tong but incase u do use a tong, the days when he spat his food back out i left 4 pieces in his food bowl, in less than 2 hours they all would be gone and no regurgitation problems. (again smaller pieces the better) also maybe show him where you are putting the food so he knows, especially if u have a designated "food spot" like i do (a stone looking food dish). my axolotl will go as far as sitting in her food dish when she is hungry sometimes, its very cute.
if these 2 changes do not work definitely changing the food. i usually would make the point that some axolotls do not like the greenish juice in red wigglers but if he swallows and spits out about 10 minutes later idk if tht would still be relevant. so try cut up night crawlers, try sinking pellet foods or any other axolotl safe option u can think of or people suggest. again with each food try leaving it in a food dish for an hour or 2. if its not gone by the end of 2 hours then remove it do not spoil the water.
i also read somewhere that since they are more active in the evening try feeding him/her then
if changing the food/ food delivery methods do not work, unfortunatly something may or may not be wrong with the axie itself.
important question will be what is your substrate if any, i hope u will not say stone or gravel... but if u do then u might wanna refer to this other thread about impacting which will cause your axolotl to stop eating
http://www.caudata.org/forum/f46-be.../f58-sick-axolotl/59162-impacted-axolotl.html
since this has happened to another axolotl of yours it is possible that the problem is in the environment. if that is the case you will have to do some research on how to help the stone or gravel swallowed to pass and immediately remove the substrate (not in that order)
this is as far as my knowledge goes, i am not aware of any diseases that might cause the axolotl to stop eating though the existence of such an illness might very likely be possible. More informed an experienced members will add onto what i said and correct me if they see anything wrong so hopefully soon we will know what is wrong with your axolotl.
