Hi,
How would you get it into the syringe with the catheter (or whatever) afterwards as well?
Mashing with the back of a spoon in water might work - danged disgusting smelling I suspect but possible.
But when you are then left with a cup of goop whats next?
Can't you just force feed a whole pinkie instead?
Either way the stress on the animal will be high - fair warning it might be enough to finish it off if it is really far gone. :(
dr del