my first question is i got 2 sister rats together at the same time and they've only fought once ( to my knowledge). and the first time they did it, they got a little blood on the side of their nose about the size of a grain of sand. is that ok if they get in fights once and a while? (btw i got them 2 days ago). my 2nd question is my black hooded one seems to not really be sneezing but like making this weird snifff sniff sound and she does it once in a while when i take her out of hte cage and right when i put her back. should i be worried? and lastly my 3rd question is do i have to put a wheel in their cage because they're females and they have a tank cage right now but when i went to get them they didnt have the cage i wanted so they're ordering it and it will be in next week but do i have to have a wheel in when i get the wire cage?