tricks to getting dog hair off dog bed?

With 3 labs sharing a dog bed the hair is stuck on heavy. The old chocolate girl sheds horrible even when using a furminator 2-3 times a week. I've tried brushing it off, washing the bed .even using duct tape but its gets so thick that the tape only works to get some of it off. The old girl is starting to loose hair so I hate to over brush her.