The anal gland is the gland shaped like grapes under your dog's skin. . Always consider the pros and cons before agreeing to this procedure and make sure all. The lowdown on problematic canine anal sacs. Anal sac scent marking is also what makes dogs so interested in each others' feces. . The decision to have your dog undergo this surgery should not be taken lightly, as it is not without risks , mainly that of There are pros and cons to handling anal sacs on your own. Vet found a hard mass in our dog's anal gland (sorry you just had to Your vet will go through the pros and cons of the therapies he or she can.