My Jack Russel constantly looked like this. Due to allergy to grass. We also changed their diet to more protein and started using TherioDerm products. Maybe once a month she would be slight pink, I would bath her with TherioDerm shampoo or just rub some of the balm on.
I also started giving them nexgard spectra. It can be mites. Jack Russel’s are quite stressed and suffers with anxiety which causes the immune system to dip and then there is mite overgrowth. But, since I started TherioDerm, I have seen a major change in her skin. She can even rub on the grass without having a breakout.