is it bad if my cat eats leaves?

I don’t know that there is anything inherently wrong with eating a leaf… but there are certainly some possible issues that might arise from it. I might be concerned about parasites, as you don’t know where that leaf has blown around to/from. You also need to make sure the leaf isn’t coming from a plant that is poisonous to your cat.

To ensure that your cat is getting the plant fiber he craves, consider growing him some cat grass. That way you can control the quality and safety of the plant life he is ingesting.

It is ok to let your cat eat leaves,this is a normal thing,cats eat leaves when they are sick or to just get rid of the furballs in their stomach