Hi, my 5.5 year old had some blood in her urine so she is on antibiotics but she is barely eating now. Brought her to the vets today to get a painkiller as she was making noises she was in pain and she isn't eating much so they gave her fluids. I'm giving her all her favourite foods and nothing, she might nibble a bit but not close at all to the amount she normally eats. Any advice or experience with this?