tumour?

My rat Jolyne is turning 2 years old this year and she's been very sick. She's currently on medication for mycoplasma (it's chronic and she had a flare up). Recently I've noticed that she's shown disinterest with food, lack of energy, very mellow when picking up (she usually tries to climb all...

Hi I am sorry I don't really know where to start because I feel completely defeated. First of all I am going to let whoever reads this know that I was aware of how expensive having rats can be. I was prepared for anything to come my way, what I wasn't expecting was a global pandemic and that I...