I've found that sometimes there is no clue on the homepage but if I click online shopping or catalog or whatever the clue is there. Some shops put the bunnies in the same place all the time (usually newsletter signup).
I really dislike shops that have miles-long pages and I have to wait for all or most of it to load before I can find the bunny. I have a slow connection and it times out a lot on those ginormous pages.