Walter notices that Chad is there immediately - enough to warn another worker walking through that there's a dog underfoot - but apart from being relieved that he's not undertaking this exploit as a human Walter doesn't respond to Chad himself right away.

This is Walter's life right now: careful underreactions to sentient dogs. Why.

He'll only gently (but firmly) lift Chad away from anything if the dog starts trying to bite the equipment. Those tents are not meant to have tears, dammit!