Dog is destroying the bushes

Hi all, first time posting. My dog is a female 4 year old black lab border collie mix. We’ve got a big yard with lots of plants and bushes. She gets two 20 minute walks and a thirty minute walk every day and my partner spends time playing and outside in our yard with her. Sometimes when we play things like fetch or tug of war in our yard, she seems to get excited and rip all of the branches twigs and sticks off of any plant near her. She tends to bite them off at the trunk, then proceeds to break them into tiny pieces. She’ll do this in the woods and will do it if I toss her a stick as well. I’m not sure I can really identify why she is doing it. Is it anxiety? Is she overstimulated? I wouldn’t mind if my partner didn’t like the plants so much. I try to keep her away from the plants but if she gets the zoomies there’s not much I can do. I also don’t want her injuring her mouth with anything sharp on a branch