I would be very concerned about her not drinking, especially if she’s been in the cat food-that’s very dangerous. I would try to see a vet tomorrow if you can-do you have a rabbit vet you’ve seen before?

How much is “a lot” of cat food? I’ve heard stories of rabbits having a nibble with no ill effects. I’m curious about the paper towels. Those can’t be good to ingest.
So she’s 7 months, which also means her body is going to be changing. Is she spayed? I’ve heard of bunnies having changes in tastes when they start maturing. No liking things they used to like and liking things they used to not like. How much is she getting pellet-wise? That is another idea because at this age you can start weaning them off of unlimited pellets. If she’s eating a lot of pellets, she could just be feeling full.

Every bun is definitely different with the things that they eat. My rabbit Linus is the PICKIEST bun. Ever. I could bet on it. When I got him, he ate everything I gave him. Then, once he reached sexual maturity, and got fixed, it was all over. I have found out which veggies he hates, and which he will eat a lot of. I only give him those ones that he eats now, and it works out. He also will eat a ton of hay, while another bun I have would rather eat all her pellets, all her greens and veggies, and then less hay. Sometimes it takes a lot of experimentation to figure out what they like.

That lack of water thing does concern me, though. One of my buns refused to drink out of the bottle, but loved the dish. Another preferred the bottle for a while. Perhaps you could try different containers/bottles? When I first had Linus and Luna together officially, when they moved in to the same cage after bonding, I had two different water bottles in there. Linus would not even go near one of them, but Luna would drink out of both. I’m telling you, rabbits are the most OCD, picky creatures sometimes! They’re so smart and particular with certain things.

However, if your bun hasn’t been to the vet before or recently, I’d definitely say to go for a good rabbit savvy vet check-up! My bun Louie showed zero signs of being ill, but when I took him to get fixed he had a severe ear infection! Stubborn dude didn’t want to show any pain. Typical man, trying to be macho.

Any decrease in appetite can be a cause for concern, especially is she has gotten into something like cat food. If she isn’t back to normal today, I would definitely schedule a vet visit.

Beautiful rabbit.

I did want to make mention of the cage being way too small for such a big rabbit – are you going to change that to a larger enclosure like an exercise pen?

Very cute bun! How much does she weigh? It’s hard to tell her size from your picture. What quantities is she getting of her food?

I agree with Sarita that she is going to need a much larger enclosure. You can still incorporate her store-bought cage, maybe make it a large litter/hay box, but attach an xpen.

In your first picture, she is in an xpen, is she always allowed to roam in that space?

Sort of off the main topic but please check out the habitat section here:
https://binkybunny.com/BUNNYINFO/GreatHabitats/tabid/229/Default.aspx

There are many housing options that would be large enough for your rabbit. It is much to small for her to be confined in it for that much time a day. :/ The MINIMUM recommended size for a single rabbit is 4′ X 2′ (8sq ft).

If she’s 5 lbs her recommended daily diet would look like:
1/5 – 2/5 cup plain pellets
1 3/4 cups veggies (I would just round it up to 2 cups). If you wet the veggies it’s a easy way to give her some extra fluid.
Unlimited Hay

Eating that much cat food definitely isn’t good for her. It is a good idea to have it out of her reach.
Have you tried spring mix? My rabbits go for the tender baby lettuces in the spring mix. You could try offering her that. What brand of pellets are you feeding? Half a cup does sound like a lot.