It's come to my attention that one of my rats is having noticeably worsening breathing problems (namely a clicking sound when breathing, which I've been told is a very bad sign). I had some medicine left over for this from last time, but it was expired so I threw it away a week ago. I know you shouldn't have a pet when you can't afford to take care of them-- but up until recently, I could have. But something came up and I needed to pour all my money into getting it fixed. Now I'm broke. Is there anything at all I can do?