how to kill rats?!?! sdjkbvkdfjhvbc

[snakekid6996]

So I went to the reptile expo today and while I was there I bought live rats, because they were 1/2 the price they cost at the pet store. I got 5 medium and 3 small rats. The problem is I thought I could put them in the freezer and they'd painlessly go to sleep and not wake up after an hour or two...well after like 5 hours they were still alive and seemed fine and I looked it up and everything said that freezing them was an extremly long and painful way to kill them. I took them out nd put them in a bin with hay as bedding and some seeds/rodent food. No one in this house has the heart to kill them :/.. I know it's supposed to be quick and painless but I cant hit there head with or against anything and I cant ring there necks...qervgkucbqrc....We don't have enough money for co2 to creat a chamber to kill them.. are there any other humain ways to do this or am I gumma have to suck it up and break all there necks?? :c