Join Date: May 2009
Location: Mid Northern TN
Assuming you're not seeing loose stool, diarrhea, gas or any other signs of him not digesting/absorbing food properly, it's just a calories game. If you want him to gain weight you need to increase his calorie intake (either more cups of food, or a more calorie dense food like the grain free types) and/or decrease his activity level. The caveat is that some animals DO have naturally high metabolisms, and just like weight loss, gain isn't always as easy as it sounds. If he's a good eater as you say though, I don't really think you'll have too much trouble.
Now, the vet part of me has to say, 10 lbs on a 61lb dog is a HUGE difference. That's like an extra 25lbs for a 150lb human. If the medical types who see him think he looks good, maybe scale that down a little to high-60's? You really don't want him carrying extra weight- labs and all large breed dogs are prone to arthritis as they age. Carrying extra weight around during their life makes it happen faster and worse, and crippling arthritis is a very, very common reason for euthanasia. So if you can prevent/delay it by keeping them lean throughout their life, you get more good quality time with your dog over his lifespan, as well as saving money on dog food.
ETA: I have an 8 and a 9 year old GSD and still occasionally have people ask if they are puppies- I chalk it up to always having kept them lean and fit. They have more go and vigor than many younger fat dogs I see. And everyone thinks healthy lean dogs are too thin around here too.
Last edited by Sharpie; 10-02-2013 at 10:38 PM.