I run with my 2 dogs, every other day. I do 40-50 mpw with them. One is a GSD x husky breed and the other a working line GSD. They wear harnesses and their leads are attached to my running belt, so I can run 'hands free'.
The things I like about running with my dogs:
They are the best running buddies - they don't whinge on about injuries (only the elderly discuss their health more than runners), or go on about negative splits.
Tourists don't stop me to ask for directions.
Safety - who's going to assault me with 2 dogs in tow and snot down my top?
I take the view that even though they're our pets, they're still animals. Animals are either alive and well or they're not. Any suffering should be ended painlessly.
We cannot put our emotions on to them. We don't know what's going through that animal's mind - it might hate having to take pills that make it thirsty, or be wheeled around in cart... but it complies because that's what pets do. All because the owner's too f*cking selfish to do the right thing.
Dogs dream and they have memories - what if it's thinking 'I used to chase rabbits, i don't want to live like this'. Most responsible owners know when it's time. Those that don't IMO should be prosecuted for cruelty.
Some vets piss me off because they can give false hope - 'We can try this test and that' - why, when the animal is old and clearly at the end of its life?' ££££ that's why.