please don't take this the wrong way, but if yourvet can't tell at nine weeks what sex your rabbit is then he probablydoes not have a ton of experience with rabbits and maybe you shouldlook for a new vet to insure that your little bunny gets the best ofcare. carolyn posted this EXCELLENT listof questions to ask your vet--i will try to find it and bump it.
yes rabbits have eyelids. blow around your rabbits eyes it will make him blink.
yes bucks can draw thier testicles up into thier body for a minute
to sex a rabbit, turn it upside down and hold the tail between yourindex and middle finger, and pull down, then press above the genitalarea with your thumb, thus stretching the area and making the organ beexposed. does will be longer with a slit, while bucks will be roundedwith a little nob at the top. at that age testicles will not be droppedyet. mature rabbits are very very easy to sex.