yeah I got this one https://www.amazon.ca/gp/product/B075P16JL2/ref=ppx_yo_dt_b_asin_image_o01_s01?ie=UTF8&psc=1
I hope none get stuck under but I think it should be okay because the gravel I'm using should be light enough for them to push it off and I think the gravel is levelled enough that it shouldn't pose a threat.