Muscular Problems

• A decline in function in the urinary sphincter muscle is the most common cause of urinary incontinence in dogs. For a long time, vets recommended reducing the amount of protein in the diet of senior dogs. This was based on the idea that high-protein diets could harm kidney function. However, dogs who receive adequate amounts of protein as they age tend to have better muscle function than dogs on a moderate or low-protein diet. A high-protein diet alone probably will not resolve urinary incontinence due to muscular problems, but in combination with the leading treatment--phenylpropanolamine--a high-protein diet can help your older pet to thrive and regain bladder control.
  
  

Hormone Deficiencies

• Female dogs that have been fixed often experience a decline in the estrogen production that can lead to urinary incontinence. The standard treatment for this kind of incontinence is a prescription for synthetic estrogen. Switching your dog to a high-protein diet may also be helpful. Protein helps to maintain a healthy metabolism in your senior dog and a healthy metabolism can support better hormone balance.
  
  

Kidney Disease & Failure

• Problems with the kidneys can lead to incontinence. Often a recommendation is made for a low-protein diet in this situation. However, a dog needs protein to thrive. Low protein can lead to low energy, tender feet and loss of muscle mass. Instead of switching your dog to a low-protein diet to combat kidney disease, try switching to a dog food that contains higher quality protein that is low in phosphorus. Often it is phosphorus that harms the kidneys rather than protein.