Adding fibre to Mia's diet

Hi guys

Mia had to have her anal glands emptied at vets last night, noticed her doing some bum scoots last few days!

Anyway vet advised to add some fibre to her diet so I've bought some wheat bran (only £1 from health food store)

How would you go about adding it to her food, she eats fish4dogs, would you add some everyday and would you sprinkle it on or wet it first?

Thanks!

Ps updated pics of Mia will be posted very soon I promise!!!

This happened with my older dog aswell, she just gets a handful of bran on her dry food in the morning!

Should be fine to just sprinkle it on i would think. How much are you giving her ??