Save Beltane's Bum

Hey guys! A couple days ago I found a weird growth on my cats bum. It kept growing and growing until I finally had a lil money to have her checked out. Sadly found out that she possibly has one of two things. An abscessed anal gland which is very common for dogs buuuut basically unheard of for cats. Especially indoor only cats! Or... She has an even more rare case buuuut not unheard of anal tumor...we have until next Sunday to raise money! Yes Corey and I work buuuut since I just started my new job we are very very not prepared for something like this!! Anything helps! We don't have kids...Beltane is our only baby and we rescued her 3 years ago from the Kent human shelter....She is my everything! Please if you can help and share it would mean the world!!