is anyone on her a vet or vet tech that could give me some advice ?!

Britni

so my cat has rodent ulcers! I volunteer at a cat rescue and the woman who runs the practice has tried helping me out and so far my cat has received 2 steroid injections.. I also got rid of all plastic bowls and went to stainless steel. Shes gonna be 4 this June and has been on the same food since I adopted her, I stuck with what the rescue fed her... I'm not sure the next step and I'm just trying to avoid an extremely expensive vet bill if anyone on her knows something.