i have a rat that looks exatcly like ur second pic. her name is "meatball" she is so freaking huge and fat. she eats nuthing but junk food. i did a lil experiment to see what she likes better, i put a doritoes chip in her cage and next to it i put a grape. and of course she decided to be a fat ass and eat the chip and left the grape to rot and die lol. i also bought her a big rat weel and the lazy bastard never uses it