My 2 1/2 year bulldog, Tank, has a bright red rear end with a large bump that's been forming on the outside of his rear from a couple of months. He's constantly doing the boot-scoot on the carpet and sometimes it bleeds a little. He has numerous allergies, to both food and environment, and I wonder if his rear end is an extension of the inflammation going on inside his body. He also has hives down his back and licks his paws all the time. Any advice? He's in a constant state of inflammation and we aren't sure how to help him. We've tried switching his food numerous times, Chinese herbs, essential oils, etc.