Hey sun, in the hardware store they'll have two types of dowels. First is pine or fir and ischeaper and safe.However your CAG will chew though it pretty quick. The other choice is a hardwood dowel that is made from oak,cost more but will last much longer. If you look up safe plants for birds ,oak is not on the list,this because the tannin found in the leaves and bark is harmful(possibly). However no bark or leaves on a hardwood dowel. I've used the oak perches for many,many years and never had a problem.This of course is here in the USA. Natural perches are better for your birds feet than smooth round dowels,which i only use in the breeder cage because they're easier to keep clean and the birds are too busy to do much chewing.PS remember that the perch needs to be larger diameter than your birds foot,in other words when your bird is perched, it's feet/nails should only reach about half way around the perch,maybe alittle more but front and back nails shouldn't meet (encircle the perch).