went in on a bulk order of mice with my cousin. I honestly expected them to be individually frozen, but they came to her as a block of mice. her husband broke them up the best he could and they gave me the ones that are all or mostly in one piece. Is there a safe way for me to defrost them enough to pull them apart so I can package them up individually for ease of feeding? Just seems to me constantly partially defrosting them to pull a mouse off once a week would be worse?