Should light infantry units have military working dogs?

I looked this up so I can't take credit for the information. Throughout antiquity dogs were used as sentries, on patrols, and attacking enemy soldiers.

You raise some valid points. In our recent wars the units at the tip of the spear have been living mostly out of combat outposts in austere environments for long stretches of time. It's crappy and stressful. Aside from the tactical benefit, having a dog might just be good for all around moral.

The cool guys run their own in house dog programs. The rest of us just have to request the asset from a supporting unit with the capability. It's not an capability that regular Infantry need enough of to make it fiscally worth while.
Then you have the actual employment of the dog. Tactical employment of a dog has special considerations. If the dog get tired it is pretty much worthless. So most Infantry units walk too far to take the dog with them. Not a problem when you have your own lift assets like a special operations raid.