Does any one use SoJo’s? If so what is your opinion of this food. I have been feeding my 5 Cavaliers this food for years. I cook chicken breast for the protein to go with it. Lately all of their anal glands have been really hard to express. They said that they are very hard, thick substance. The doctor said it’s probably the food that I feed them. I have also thought I was feeding them good. Any thoughts???