I have a beautiful, five-month old, 40 pound, ginger-colored labrador chow mix. Her skin and her hair have always been beautiful. While petting her this evening, I discovered a terrible rash that has popped up on her today. It is all over her tummy; lots of small, red pimply little bumps. She also has larger places as large as a dime on her chest, inner hind quarters, hind legs
, and a few bigger ones on her outer hind quarters also. I am concerned about a huge, swollen, red puffy place under her left front "armpit." It is as large as a silver dollar, and I can't imagine what happened. I can't tell if it was a bite, but it appeared simultaneously with all of these other places on her. Inside her mouth looks fine, and she isn't having any breathing problems. Abbie is on heartworm and flea/tick protection. She is totally flea free.
She isn't quite her usual playful self tonight, but has been nibbling on her food all evening (which is the way she normally eats). Today, she ate (for the first time), 2 or 3 kids' Goldfish crackers that friends gave her, with my okay. I also gave her a small, beefhide, chicken
-flavored stick, and she also swiped one from my other dog. She has had these before. During the day, she also had two small, Purina Beggin' Poppers, which are bacon and cheese (cheddar and Monterey Jack) flavors. I think it was her first time for these. I'm including this information in case her rash is food related. I hope you can assist me. Is Benadryl appropriate for a rash such as this, or what should I do?