Tarantula biting?

I have an adult G. Rosea and in her cage is a plastic palm tree like plant I got at a petstore. Basically it's her favorite hide (she has a log in the other corner), well today I noticed her leaning against the wall like she was going to climb it, but she had one of the leaflet things in her little palps and appeared to be biting on it. It turns out there are a bunch of bite marks on the leaf. Any reason she's doing this?
BTW, I feed her quite often (probably more than she needs)

It's called remodelling. A number of T's (Acanthoscurria spp. are famous for it btw) does this. Nothing to be worried about imo.

Probably just "smelling" it? Sorry I don't have an exact answer.

[Edit]
Wow, I never though of remodelling. I guess I better stay off the boards until I get my brain back on track.

I've seen pictures on this forum of tarantulas that literally tore apart the foam backing on their enclosures. They're spiders, they do what they want. I like to throw in an appropriate sized paper ball into my active T's enclosures - most of them actually do some interesting things. Carry it around for a few days, bury it, throw it in the water dish, incorporate it into the webbing, etc. Since you appear to have an active tarantula, try that out!

I love watching my tarantulas remodel! My MM Euathlus sp. "red" is the king of remodeling.

Here is a video of him doing so with his substrate. Very 'cute' the way he uses his fangs/pedipalps to move it around and 'bulldoze' so to speak.

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