Absolutely! Increasing the fiber in his diet will help a great deal. You can add some cooked carrots, peas or other vegetable to his food in small amounts.
Another great tool for managing anal gland problems is keeping the dog at a healthy weight. It all comes down to the tighness of their bottom when they push to poop. If their bottom is flabby, they won't be able to push and compress the glands as much.
So keeping the dog at a healthy weight will help a lot.
Keep in mind that there are surgeries that can completely remove the glands if they are too big a problem.
Let me know if you still have questions.
