Oooops sorry....you'll see people refer to prey as either "live, p/k or f/t"...meaning they feed the prey to the snake either live, pre-killed (kill it then feed it immediately) or frozen thawed where you can buy in ahead then defrost and warm up what prey you need each week.
Everyone does it the way they feel is best for themselves or their particular snake. Each way has it's pro's and con's and there a ton of threads here to help anyone decide which way they are most happy with or what their snake will consistently accept.
~~Jo~~