Why is my allergic dog scratching raw and acting so sluggish?

Hi and thanks for using Petco Pet Education Center, formerly Petcoach! Sorry to hear about Jack. Allergies can be very frustrating but with the right diagnosis and treatment, can be effectively managed. You have described what could very well be seasonal allergies called Atopy in dogs since you talk about a seasonal pattern. We are in a peak time for late summer allergies in humans and dogs who are allergic to weed pollens which are high at this time of year. Of course other inhaled allergies could be present and cross reactivity exists between some allergens. Each year or allergy season can be worse than the last if the pet becomes allergic to more things. Dogs can also be allergic to flea bites called Flea Allergy Dermatitis (FAD) and a smaller group of allergic dogs can have food allergies. What you are describing sounds like an inflammation/infection of the skin due to self trauma caused by Jack licking, scratching, chewing, etc those areas. Once the skin barrier is broken the surface bacteria can multiply and gain access to the deeper skin areas causing problems like you discuss. I would advise taking Jack to your vet and let them take a thorough history, do a complete physical, and then advise some diagnostics and/or treatment to address what is going on. Some skin diagnostics include skin scrape, Wood's lamp exam, fungal culture, etc. These would be performed to rule out a problem with mites or fungal organisms. Treatment for allergies includes antibiotics, antihistamines, sometimes steroids for itching, immune modulating drugs (Apoquel), using a good flea/tick product advised by your vet, fish oil, topical treatments, etc. If you wanted to pursue allergy testing, your vet can advise you on that. There are skin tests and blood tests for that and sometimes that involves going to a veterinary dermatologist for some of those services. The goal would be to identify the allergies and then start a hyposensitization program to decrease the body's immune response to the allergy, very similar to allergy shots. They even make allergy drops or sprays that are oral now. Good luck with Jack. I hope he gets a lot more comfortable very soon.