?

I just got a new rat today, and she is sneezing and sounds just slightly congested. I have her in quarantine from my other rats, but I don't know if I should get her treatment or if her sneezing will get better on its own. At the pet store she was in a small glass cage with pine bedding, so now that she's in a better cage with carefresh will it get better? Besides that she's eating and seems pretty healthy, I'm not going to take her back.

I have a plum tree and just a couple days ago I noticed it had the fungus. I know you're supposed to cut it off in the winter before new growth starts, but it's already early spring. Should I wait a year until next winter or just take care of it now before it spreads more?