Beautiful babies you have there....
I have to agree about the food.Not a good one.
By any chance do you feed him canned?I have fed all my neutered cats canned.And none have them have ever had issues with crystals.Mine get both the canned and dry.As for the dry,the are on Performatin Ultra Holistic.
I have been told that crystals are caused by not enough water getting into them.Canned has the water they need.Especially if they don't drink that much water.
