Hey /an/ I'm quite worried about my Axolotls as tonight they refused to eat their favourite meal...Earthworm

They would happily snatch them out of my fingers but after attempting to eat them, they would spit them back out, whats wrong with them? The water levels are fine and nothings changed recently...i've been growing the worms myself and they've eaten the last few perfectly....

Their diet varies from Earthworms one week, to Prawns, salmon pellets and feeder fish. I've had them for 5 months now. wtf is wrong?

I feed them every two days and it worries me when they don't eat.