Let me see if I have this straight; a furry tailed rat is chewing up the cushion on your $200 swing and you want advice on how to alleviate your problem without hurting the potentially pregnant furry tailed rat? See, that's what is really neat about humans. Even though our DNA is the same; we can react so differently to situations. On the one hand, common sense would tell me to shoot the damn squirrel before it procreates and I now have a family of rats chewing up my cushions. I would not be bothered even a little bit about this knowing that my actions would have an immeasurably small impact on the squirrel population while also having a profound impact on my sense of mind concerning the cushions on my $200 swing. On the other hand, you want to save the squirrel while also trying in vain to save your cushions because you feel some sense of loyalty to the rodent who couldn't care less about you. It's amazing to me that I can't even comprehend your thought process while mine, I'm sure, seems just as foreign to you and probably barbaric to boot!! What a true picture of the complexities of man!!!
Good luck with your "dilemma".