I tried the blood. *That lasted until we had a few good rains however it attracted raccoons that soon discovered I had ponds over here. The raccoons ate all the fish in my main pond so I ended up having to run electrical zap wire around one of them. Now the raccoons are in my garbage and composters. They never left. Opportunistic thugs.
The squirrel feeders do work in all seasons except fall around here. The only problem with the squirrel feeders is that is artificial feeding and I swear the squirrels have a network and tell their buddies to come on over for the free smorgasbord. We had about 20 squirrels and that number doubled when we stocked feeders with peanuts so we stopped. *In fall, the feeders didn't help at all as the squirrels are hardwired to bury acorns and nuts. I am in a heavily wooded area of oaks and hickories. The feeders might work in areas that don't have fruiting trees.
I'm still thinking chicken wire on a frame or attached to stakes is about the best for me.