Are There Any Products For Dogs With Sensitive Skin.?

Hi I grew up way the heck out in the sticks an when our dogs got any skin irrations we changed food diet ( 1 cup food ,1/4 cup cottage cheese,1 tablespoon veggie or bacon oil)........ I think that the cottage cheese an oil really makes they skin so much smoother an its a cheap fix an it works ! our family is 7th generation Texans an they've used this for about 100 yrs!