My bitch is a senior dog about 8-9 yrs old, and extremely overweight. She made very loud snoring / breathing when she is resting / sleeping. It is common for dogs to snore, but I suspect her heavy breathing is due to the obesity. Will it pose any serious health condition? She has annual health checkup and all clear at the moment.

Another issue, her hind leg was replace with artifical bone due to fracture in her younger days. Its getting weaker everyday, despite having 1000mg of glucosamine. Walking is a strain for her, what can I do to improve?

You answered the question. The excess weight is the problem and presently in a Catch 22 moment. The snoring is really brought on by the weight just like people the bigger you are the more prone you'll be to snoring. Example in the first of the year Beth & I snored like pigs in a feed lot but since then with both of us losing approx. 20 lbs each she no longer wakes me and nor do I wake her with snoring noises.

I don't think the glucosamine will help the bone issue but it will help her joints. But you've got to get her moving even if its just a 5 minute a day walk to start then slowly increase the times.

The resident pro for overweight dogs we have here is Claudia who adopted a extremely obese Husky and now pretty much is the picture of health.

Check out: https://www.itsahuskything.com/t2290-storm-s-weight-loss-progress?highlight=storm