My natural Cavalier Spaniels like nothing so much as to raise a leg on a speaker; BUT, what they really prefer are subs. Have got a 15" Hsu Research sub at the other place that has a multi-decorated, round grill that would not, I suspect, pass a health test.
SO, I need the grills and, in any case, prefer that look over a large number of speakers -- no matter how impressive they might appear. Keep us apprised, Jeffery of the ULFs development as a number of us are interested.