lone rat advice
hi everyone. I need some advice about a lone rat. my sister adopted two young female rats from a shelter (probably about six-eight weeks?) about two months ago. about a week ago, one of them developed a tumor on her belly and by two days ago it was half her size, and the vet said the best thing we could do was just put her down. it was so sad for us with her being so young, but it was also very sad for her cagemate. the now lone rat sits in the corner of the cage and she just lies there, not even sleeping sometimes but not moving, and not really eating unless we put the food within reach of her mouth. she used to be extremely active and run around constantly.
we have taken her out all the time and pet her and given her love as much as possible in these two days, but whenever she's in the cage, she lies in the corner, and hardly even gets excited when we come near. she is obviously depressed and lonely. the vet said to just keep giving her attention but it is heartbreaking to see her like this!
it is very hard to find young rats (or any rats for that matter) around here that are not from a pet store. I need advice: should we buy a pet store rat, just this once, for a companion? should we just give her a little more time to cheer up and keep her alone?
I have two young females, as well, and we could try to introduce her to them. but I am only living here for two more months, and I know my sister would be crushed to have to lose both her rats.
any thoughts?? thank you!