this could be related to nutrition in that:

The advancements in vet medicine is astounding and I'm glad to see so many are considering alternatives to euthanasia for treatable conditions.

As hubby's grannie use to say, "Well I never!".  Gee, i would have never thought about something like this.  Most interesting.

Interesting.  Gobie, my 10 yr old minpin has several fatty tumors, one is directly behind his right front elbow. It does not seem to limit his mobility yet. I've had it and the othe rtumors looked at and my vet balked at the idea of removing all of them.  Some are about the diameter of a dime or nickel. One is as big as a grape and the one behind his front right leg is walnut sized.  he already had 2 removed from his chest a few years ago. 
 
I try to keep him slimmed down. As he's aged, he really holds the weight.  I've cut him back to the 6lb recommmended feeding amounts of PetGuard and it seems to be keeping him at 13lbs, which is a good weight for him.  The tumors have stabilized and stopped growing as much.
 
Aside from hindering mobility, those fatty t umors really take away from the sleek look of the dog and I think he finds wearing harnesses for his walk uncomfortable.
 
I am in a new area and may look into another vet and getting another opinion about removing the tumors, especially the walnut sized one and the grape sized one, which is above his left shoulder, near his throat.

fatty tumors are not a problem untill they become a problem,, possible like your pups limp...whatever check them at least once a month..if they change firmness then get them removed because they  can deveope into big problems..just be sure to check them monthly...if they hinder locomotion, get them removed...if they bother you esthetically---forget it

It's been one of my thoughts that what has helped dog live longer is better and sooner diagnoses, new or, in this case, re-directed treatments, the owner's willingness to pay, and the owner's closer attention to their pets health. That was an interesting article. Thanks for sharing.