My 17 year old cat has suddenly changed her eating habits. She adored tuna so, although she is on a dry food diet, I give her a nightly treat of a tiny amount of tuna in spring water. She comes and cries for it every night as she loves it so much. Over the last week she has stopped eating it and only eats a tiny amount of dry food. I gave her some dreamies a few hours ago and she only ate about 3. She sleeps a lot because she’s elderly but is still going in and out of the garden. She now makes wet, slurpy sounds as she eats. I have a vet appointment this afternoon but I’m so worried. Anyone experienced this?