<eyebrows> when i first started having no sleep the first time in my life.. i had strange side effects, in class the next day i was so out of it i would repeat my comments twice because i lost concentration.. and one time because of lack of sleep i started hearing this in and out breathing sound coming from my head <sane2> My rabbits were so habituated that whenever I would go outside (where their cage was) they would scurry and jump against their cage door , as if i was bringing them food. Whenever i did bring them food it was hard to give it to them, because they were blocking the door