hi.i bought a 6 foot red-tail boa 2 week ago and it hasn't for just over a month.it refuses a f/t mouse.the place i got it from says it last fed on a live rat but refuses a f/t rat.when i had the snake out i noticed the breathing sounded a little deep with a slight wheeze.also a couple of red blotches near its head.the belly scales are also pink but i think this is normal isn't it for a rtb.is feeding the snake a live rat a good idea because i'm a little concerned about the damage it could do.any advice please?