[alaskayorkie]

I'll address what I can:
* You're absolutely right to cut out the table scraps. Just say no.
* Get the vet to look at Kelli's throat. Yorkies can have problems with a collapsed larynx, though don't panic until you talk to the vet. There are other reasons for coughing.
* I'm a firm believer in active exercise. Roaming the yard is not enough. But, as with an out of shape human, start slow. Daily 20 minute walks would be a good start. If you're short on time, hire a neighbor kid.
* Once she gets closer to her goal weight, start throwing toys for her and getting her to run. If she doesn't like toys, have her sit-stay and run to a treat when you say "come." You can do that in the backyard.
* Sounds like your twice-a-day feeding schedule is great.
* Good luck.