I have a 10 month blue nose pit. The past few months she has been getting red spots on her belly & inner thighs. Vet said it was a bacterial infection. She has been on & off antibiotics for months. I feed her blue buffalo & recently put her on the simple no grain formula. The vet believes it could be environmental but isn't 100%. She has been tested for that skin disorder blue nose Pitts are susceptible to & it was negative. While petting her a ton of hair fell out. Not normal shedding & she now looks like she is getting spots where the hair is very thin. Also the red bumps are back and looks like her skin has dry patches. She is not itching or anything. i live in Las Vegas, it's cooling down & there are also no fleas here. She is an indoor dog I never leave her outside unattended because she tries to eat everything. I crate her when I go to work she is used to it and goes in on command & its large 3ftx4ft.. Just for a bit of background.. Any info or help would be very appreciated.