My juvi male ackie just excreted this funny looking poo, it's runny and grey. His is normally brownish and more solid. what could this mean?

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1.0 Red ackie monitor (Frederick)
0.0.1 Bosc's monitor (don't know yet)
1.2 Chinese water dragons (Gimp, Guap, Basil)
0.0.1 Day gecko (peter)
1.0 Green tree frog (bell)
1.0 Red albino corn snake (kirby)
1.0 Cavi (Gromit)
0.1 Eqyptian spiny mouse (Cleo)
0.1 Rat (Booger)
0.1 Giant african millipede (Zoe)
1.0 Beta (don't know yet)
0.1 Calico cat (Saffron)


