Are you losing? and does it matter that the HR monotor is lower? When I use the eliptical my Bodybugg shows 400 calories in an hour, about 400 when I walk for an hour etc. The eliptical shows 650ish for the same hour. the online calorie calculators show well over 800...so here is my point. if I stick to my food plan (1400 calories a day) and my bodybugg showa 2400 calories or more burned a day I am measuring against the same constant. AND if i happen to be burining more than my BB is reading, all the better...so my advicce is to chose the lower number and work with that because if you are buring more than the number says it only works in your favor.
If your dog is fat, you aren't getting enough exercise