And who are you to say that the security didn't spot it - they
could've just closed one eye, you know. The dog's in a carrier and
not the yappy kind. Are you claiming that you can force an animal
to swallow a bomb? Otherwise, what threat is there? 
The last part of the STOMP article is a bit of conjecture. Sure,
some people are allergic to animal hair, but don't try to second
guess what they are thinking.
Firstly, im nt trying to say tht a dog can be made to swallow a
bomb or wadever. If the securities can miss this, wad makes u think
they will be able to spot a suspicious person? Somemore thr is alr
a sign saying no pets allowed if u look carefully, ask the MRT
personnel if u wan
If rly canot make it, at least use a fully enclosed carrier la,
like those for hamsters. Somemore tis aunty dare to give the
frustrated look, do smth wrong also nvr feel shame.