Instead of running wild over hills and dales, they get walked twice a day, if they are lucky, and get to pee on a tree in the midst of a concrete wasteland. If we were honest with ourselves, we would call this selfish. We would acknowledge that the dogs are not as happy as they could be, but we think they are cute and they amuse us, so we imprison them.
Few insects produce methane and the protein they provide would be an efficient and sustainable way to increase intake as the population grows. It could be argued that if we can overcome the fear of eating lab grown meat then we should instead get over our cultural aversions to eating edible insects.
If every person in the UK went meat free for one day, it would reduce our carbon footprint by more than if every vehicle in the UK was taken off the road for one day! As well as being responsible for a huge amount of global greenhouse gas emissions, meat production requires increasingly unsustainable levels of precious resources - land, water and energy...
The recent anti-halal hysteria has nothing to do with the welfare of animals. It's just good old-fashioned Islamophobia. This is not to say that some people don't have sincere concerns about the way in which animals are slaughtered: they do. But these are not the people now jumping on the anti-halal bandwagon.