There are some really important things about your book in general, and this has nothing to do with making a warrior cat. But it's very important, so I suggest you actually read this.

1. ALWAYS. ALWAYS. ALWAYS. ALWAYS CREDIT ARTISTS.
      If you didn't make the piece of art that you feature on a chapter or even the cover, you bet your booty you need to credit the artist. As an artist myself, I love having people comment on my art and I wouldn't mind having my art featured for a chapter. However, I would be really hurt if someone took my art and used for a chapter cover and didn't credit me. So, moral of this point, always go out of your way to find who's art your using and credit them.

2. Covers are Everything
      Covers are seriously everything. People judge if they want to read your book based on the cover, no joke. If it's a good cover, people will think 'oh, this looks interesting, the cover is pretty,' and then they read the description and then they read the book. So take time to make the cover. Figure out the lay-out you want. Do you want a classic Erin Hunter Warrior book cover, with a nature background and a square/circle with the main characters face? Or do you want a photo of your main character with the title? Get a good picture, maybe put a filter on it, and make it look nice. Boom. Hopefully really good cover. Once again, if you use someone's art for your cover, credit them at the bottom of your description.

3. Make sure you're Interested.
      If you aren't interested in your story or if you're snoozing off trying to write it, your readers will too. But, if you're invested in the story, enjoy writing it, get excited and experience emotions when you re-read it, your readers will too and they'll want more.

4. Don't Gender Warrior Names
      I highly suggest you don't label warrior prefixes or suffixes as gendered. Prefixes are supposed to reflect the pelt, so mothers aren't really going around like 'OMG his name is Silverkit?! But that's a girls name!!' Seriously, Silver-- and every other prefix aren't gendered. So you probably shouldn't gender them either. Prefixes like Rose- Ivy- and Lion- are often gendered. I once had a character named Lionstorm who was a girl, and everybody thought she was a boy because of the prefix. I wish for a world where his doesn't happen, but unfortunately this is a never mentioned topic.

5. Your Character Doesn't Need to be Conveniently Attractive
       Your character doesn't need to be conveniently attractive for you to get reads or for them to get a mate or friends. Rather than having a 'white, fluffy, soft, beautiful she-cat with blue eyes' or a 'silver tabby, long-haired, gorgeous she-cat with blue eyes' do a tortoiseshell or a brown tabby. Rather than soft and fluffy do short and thick or medium length be wildly out-of-place. Getting a mate doesn't rely on looks, it relies on how they interact. Which brings me to...

6. Your Cat Needs Relationships
      Don't forget about friendships. Every cat has at least one friend, or a main point in the story should be that they have no friends and they want some. A lot of people forget about this. And not every cat needs to be their BFF, some cats can just be acquaintances, or they don't even have to like another cat. Enemies are good too. Oh, and on an important note:

7. Mates
      Mates don't need to be 'love at first sight.' It can be friends-to lovers, or even better 'I hate you' to 'I love you.' Mmmm yes. Make sure build up the relationship though, it can't just go 'I just met you like two days ago but I love you' also, keep in mind that you need to build up relationships like these. So that way, you can reflect on when they went swimming in the river, or when they played in the meadow, or had tree climbing contests. Whatever. Going straight to lovers is never as interesting as going straight to friends and slowly to lovers. And one more thing: the 'they're in another clan but we're in love' is, in fact, a cliché you might want to stay away from, or at least only for secondary characters or background characters. Being mates isn't about having a boat-load of drama, it's about love. And love can be found in your own clan mates. And that's a fact.