clown behaviour

Two types of clowns which I'd like advice on!

1) Clown loach - mine have just started to do the "pretending to
be dead" act. I have read this is typical loach behaviour, but
is it because they are unhappy/happy/growing up/whatever?

2) Clown synodontis - I was given a 7" female three months ago.
She hides all day and I never see her move! I've never seen her
out when I've had to disturb the tank at night either. I leave
food out, and it goes, but it could be the pleco taking it. Any
advice on how much I should feed at night, or how I can be sure
she is ok - other than the fact she isn't dead yet?

Thanks,

--
Flash Wilson
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"I'm an advocate of sex before marriage.
Otherwise I wouldn't have had any at all."