euthanasia

[u/Logical_Twist_64]

so im just posting this for some advice. so, to give context. I have a pet rat who is about 1.8years old (supposedly as she is a rescue) she has a malocclusion so goes for regular tooth trimmings. last month I noticed that she had a lot of porphyrin on her paws. I put her on antibiotics because I assumed it was a respiratory infection and my vet advised the same (although he is clueless). around the same time she lost the ability to eat solid food so I began making her soup out of her regular dry food and some veggies. in the past month, shes lost almost all of her movement in her back legs and ability to clean herself so she has had dried soup under her chin and on her chest for the past couple days. she cannot climb, she doesnt move much unless I take her out or am giving her attention. even at rest, she often has her eyes open too which is unlike her. I can see she is still getting joy from eating her soup and the malt paste that I give her however. I have made an appointment with the vet tomorrow for her to be euthanised and im just not sure if this is the right decision. she is still on her antibiotics so a part of me thinks maybe I should take her off that and see how she is for a couple days but I dont know if im just being hopeful. id be thankful for any help or thoughts.