our 6 month old boxer has whelps or hives on him he ate his regular dog food this morning and spent the day at my sewing shop he was given a couple of french fry and a piece of hamburger , when we noticed the whelps about an hour later and gave a bath when we got home and a benidril he is still broke out what do you think may have caused this ?

Your poor pup! Typically hives like that are due to an allergic reaction, which could be due to something environmental, a bite from an insect, or even food. Given that you have administered Benadry with no effect, I would take him into the vet immediately. The problem with allergic reactions is that they can progress to swelling of the face and muzzle, and this could block his breathing leading to respiratory distress. He likely needs stronger drugs like steroids to control the reaction. Please take him into an ER vet clinic; if there isn't one in your area, there will be a vet on call for emergencies. The information to reach that vet is found on a clinic's answering machine or website. Good luck, I hope this helps!

You did everything correctly!!! Now, just continue to monitor her. Make sure the swelling starts to subside and that no other issues develop. You can repeat the Benadryl 4-6 hours after you gave it if she still has some swelling. It may make her drowsy. Good work !!!

It is always hard to tell by a picture but it does appear to look like hives. Hives typically are from allergies. I would recommend taking her to a veterinarian because usually an anti histamine is not going to be strong enough on its own. Most of the time a steroid is needed to decrease the inflammation. Hope this helps!!!