Hey mate,
I fed my axolotls bloodworms to start, but they are so messy. So then I went to pellets but eh they are no better.
MEAL WORMS are the absolutely BOMB for feeding axies, mine eat at least 5 each daily. They don't stop, they just keep eating like machines. Meal worms are easy, just use tweezers and drop it right ontop of their heads and they will go in for the kill, if they miss the wriggle around on the bottom for a bit and the axies will grab them.
Meal worms are the cleanest and apparently best good in my experience. All this talk of axies not eating seems like a 8/10 thing. Mine eat mealworms till they cbf looking up for food anymore lol