Why are the leaves on my cat's pajamas turning yellow?

I have to ask, are you serious? Because the concept of a cat wearing pajamas, let alone the idea of their leaves turning yellow, is quite unconventional and frankly, a bit absurd. Now, if we're talking about a plant or a tree, the yellowing of leaves could be attributed to a number of factors such as nutrient deficiencies, overwatering, or pests. But in the context of a cat's pajamas, it seems like we're dealing with a figurative or imaginative scenario. So, could you perhaps clarify what you meant by that statement?