People are always getting the hump about what other people have, and whether they ought to have it or not. There's an undertone of 'deserving' and much tutting if visibly 'poor' folk have anything nice.
It makes me fume. If a sad, homeless, hungry and dirty chap loves his dog and it gives him comfort, it may be the only good thing in his miserable life, as Joe says above.
It's so cruel and unfeeling to grudge him some pleasure in the love of a loyal pet.
I often wonder if compassion and fellow-feeling have gone out of fashion.
Are people made of stone nowadays?