My pigs prefer orange over any other. Then red, yellow, and at the bottom green. Red is the highest in vit c but all bell peppers are loaded with it. There are also purple and white bell peppers which I haven't seen in stores yet and my bell pepper plants didn't grow. Only the cherry peppers did.
My pigs love them all! I have 20 pepper plants growing in my yard (all different colors), the green ones are about ready to harvest. I now know why the red/yellow/orange peppers cost more at the grocery store - they take a lot longer to ripen and harvest.
Mine love the red and green peppers. I haven't tried the orange ones yet. I'd like to because by me, the red peppers are a lot more expensive than the orange and green.
I wasn't sure my piggies would like orange bell peppers-they're used to getting just red. So I cut up 5 baby carrots and slipped it in with the orange bell pepper. They took to it just like a fish to water!
Seeds are not toxic... A potential choking hazard maybe although I haven't really heard any cautions against that either but definitely not toxic. I know of many people that feed whole peppers seeds included to their pigs. I usually chop mine in half and knock most of the seeds out in the trash. They love the middle part the best and often hunt out the seeds to eat them.
Color peppers cost more because they are sweeter to the taste then green ones. If you ever go to a party and have a relish dish just taste the difference.
I was thinking about this last night, when I picked up veggies for my pigs AND the new pigs we're adopting on Saturday (wooo hoo!). There was a pack with orange, green, yellow, and red peppers, which was cheaper than buying individual ones, but I never came across info on orange and yellow peppers, so I didn't buy it. Now I know.