wow. impressive crop of sunflowers you have there! I always love your pictures...
I was just wondering if the seeds would be harmful to them. The outside is hard and sharp when chewed, would they cause damage when they pass through them? I'm sure others on here have a better idea than I do, that's just what occured to me.
Sandy, my mom's old dog use to eat them. It was funny too, he would only eat the seed inside. You could see the shells fall from his mouth as he ate them. I don't know how he did it, but he could seperate the seeds/shells faster than I could.
He did the same with watermelon, the seeds would just fall out of his mouth.
Don't know exactly about sunflower seeds, but we were feeding thistle + other bird seed in our bird feeders. Bubba started eating the stuff the birds dropped seeds, hulls, etc. and threw up. Called the vet and she said to get rid of the feeders. That thistle seed has sharp points which can irritate the stomach and intestines. Sunflower seeds are sharp too, but I would check with a vet to be sure.