If animals don't feel pain, then why do they limp when they hurt their leg and holler and jump back when you touch it? They bleed, don't they?
The verses you used say nothing about an animal feeling pain (which means it doesn't say if they do or don't) All they say is that humans have permission from God to eat them, and also say humans are just a higher rank since they are made in God's image.
If you don't think animals feel pain, then adopt a pet and beat it all you want.
Who's stopping you?
You say the dog's having fun being hung? Huh, I guess that's fun for all of us to hang by the neck. At your kid's next birthday party, bring up that new game where all the kids hang by their necks. Oooh, those kids look like they're having fun.