They are probably force feeding it due to illness.. providing no light and wramth is quite possibly causing that very problem. Go to the store demand a manager or owner and tell them the problem. If they dont give a shit tell them they lost your business (they would mine).. i would also make complaints on craigslist, local health care authority, humane society etc. The reason i mention health care authority.. reptiles that are are not provided proper temps and lighting are very prone to higher counts of salonella.. while every animal including people have this bacteria, reptiles are often times looked at for causing outbreaks... and these outbreaks are very commonly caused by assholes selling sick and improply taken care of reptiles. Tell the dude to take care of his pets, health care authorities are legally obligated to inspect... they WILL shut the bastard down.