Hi and welcome to YT!
One cup of kibble a day sounds like a bit much. Is that the amount recommended on the packaging? If it is a bit much, cut back on the amount a little. Also, any activity even indoors is better than laying around. If weather doesn't permit walking, playing with him (fetch, chase, etc.) will at least keep him active. I know it takes time for weight loss but with reduced amount of food and daily activity he should show some improvement.
You might just want to bundle him up on those cold days and get him outside. I know we've got several yorkies on YT, living in colder climates that still spend time outdoors.
__________________  ~Ruby, Reno, Razz, & Jack~ |