My dog chews up the garland and the tinsel.. not so much the ornaments. I only figured this out when I noticed glitter in the poo.. Now, I have stopped decorating the lower branches with garland. I used to strew tinsel on the floor beneath the tree, now I have to stop that practice too.
Last year I just used some snowy soft material with tinsel hidden under it. Even that didn't work out very well as she dug it up and still ate it.. This year I may just use the material with some gold sprayed garden statues which I have just dried in the sun.. Since this is a huge tree it does look bare at the bottom.. I need to come up with something that does not attract my dog's attention but still looks good.