At the word “fetch”, the massive Cybertronian canine at his side raises its head, interest peaked.
“You can go and fetch things yourself, Smokescreen.”
Smokescreen’s throwing some kinda toy over for the canine- maybe has another toy, dangling it to try to get Megatron’s attention.
“No, no, I can’t- you gotta do it!”

“I will do no such thing.”
However, the canine galumphs towards the thrown object, limping but running with the rest of its six legs. It picks up the suspiciously-shaped toy in its mouth and starts back towards the strange small mech. Again?
