Brooklyn1 wrote:
> Should also be aware to never give synthetic yarn to cats, often they
> will swallow it and by the time they begin displaying symptoms it
> could be too late. For bird nest building the best material to make
> available is clothes dryer lint. I'm always careful not to put
> anything outside that can harm critters, scrap yarn is dangerous as
> many animals will ingest it and not be able to pass it... I've seen
> robins with dental floss hanging out of their beak.
>
I've been thinking that the lint should be from natural fibers too, yes?
At least that and cotton have really short fibers.