I would not mix these two types of litter as the tidy cat litter will interfere with the other litter's ability to attract your cat to it and it's own clumping ability.

This product was the savior for my household. Give it a try, I don’t think you will be disappointed. 

I don't know anything about tidy breeze pellets, but I use this with world's best litter. It doesn't do anything to alter the smell, but I don't have that problem with WB litter.

The label says it is not to be used with natural cat litter, so no. Our initial plan was to use it with World's best. We ended up getting clay litter to use the attractant. I'm honestly not sure if it worked for my elderly cat.

First of all, some cats really do not like the paper pellets. They need to be able to feel like they are digging in something. I had an older cat that stopped using the box, and I bought this litter and it was like magic. He started using the box again. It is quite expensive compared with regular clay litter, but gradually  I was able to use less and less of this litter mixed with regular clay litter so the cost became less. But it was the only thing that worked. I wish you luck with your kitten

You can use Ultra Litter Attract with any litter. I used mine with Arm & Hammer Clumping Litter.

The additive works on a smell premise so it does need to be used with a clumping clay non scented litter. Our Ultra litter has no scent, additives , perfumes or deodorants. It also has a texture a cat prefers which can be an issue for non use the litter box as well.

The Litter Additive works on a smell premise and alternative litters like corn smell like their composition so will overwhelm the smell of the additive and make it difficult for the cat to smell.

Hi L McD, This item is only intended for cats.

Yes, for us, it has been an important piece of the puzzle. I would advise trying to figure out why the cat is doing this. In our case, it seemed to be mostly due to harassment by our other cat who herself was feeling unhappy due to winter cabin fever, a relatively new dog, and not enough attention. It took some time and observation to figure this out, but we seem to have settled the issue (going on a year now). We relocated one of the litter boxes, now sift the litter every day and sprinkle a bit of litter attractant on top each time, keep towels and clothes off the floor (her favorite winter alternative), and make sure both cats are getting enough attention and the dogs enough exercise. In our case this product was not a simple one-step solution, but definitely a part of what helps our cat feel comfortable using her litter box.