Sick, dead or something else?

[chicken]

I got 4 baby axolotls, they are all 7 days old now.

1 of them is doing weird today, it is reacting very slow when i go with a spoon near him/her.
Like i need a whole minute to make him/her move. Now he/she is not reacting anymore and the head has more black dots then the other 3. Is this axo dead or just sick?

I'm feeding them chopped living tubifex.

 

[stewart]

Is the one that you are talking aboult white?

 

[sharn]

perhaps isolating it to moniter it further would be the best option if you still cant tell. good luck!