Since they have a high amount of lean mass of muscles, the dogs need food of animal background. (usbones.com)
Once you reach the intermediate phase and beyond, gains in lean mass and strength are very closely correlated in comparison. (getthisstrength.com)
To gain lean mass instead of body fat, incorporate a resistance - training program, like weight lifting, into your weight - gain regimen. (healthyeating.sfgate.com)