we had cucarachas coming from neighbours - you know, those small, nasty ones? (yeah, that can refer to both neighbours and cucarachas) powder poison worked well on that. some chinese stuff, smelling like crashed cookies, i almost fell a victim to that fragrance myself.
then we had ants, big, black vicious dudes stealing cat's food. i put those small mata hormigas traps. worked. did not do anything for tiny red ants that show deep interest in cat's bowl and dive into his water by dozens.
big cucarachas - cat takes care of them but i would appreciate if he did not place their small stiff carcasses where i step on them with a loud CRUNCH...
lizards are smart - they stay out of range of cat's paws. less luck for big spiders, yesterday i saw one with 5 legs only. either the cat or the maid was too energetic with her mop.
in any case - i don't feel sorry for those little buggers. there is more them than us, no?