Needing to switch up the food

[Daytonamags]

Am looking for some answers for Raw Dog Food (without making it). My guy, age 8, has been on Stella and Chewy's meal mixers for 3 years and never had
a problem but having losing some hair on both sides tells me something is missing in his diet. He eats Pro Plan sensitive stomach + the stella and chewy's meal mixers.
Can anyone make a suggestion what I could try to see if this helps. Thanks

 

[2bullymama]

Why not dump the purina (not a good food in my opinion) use open farm or Zingnature if looking for a kibble. Also avoid chicken as it tends to cause issues in bulldogs