

I want to take her to the vet but my mom is unsure. I tried giving her a Benadryl but she chewed it and idk how much she swallowed, as her muzzle is so swollen i couldnt give it to her properly
She's itchy but she's breathing ok and not throwing up. The hives go all over her legs and feet. She wasn't like this this morning, my mom said she got into something but she got it away asap and doesnt know what it was. This dog has an autoimmune disease, and a weak immune system, deals with skin allergies all the time.
What should i do in the meantime? Waiting for my mom to get home to try and convince her to bring her to the vet. Any idea what could have caused this, from the dog being inside all day? Could she have eaten a bug or something that caused this?
Shes a pit mix, like 8-10 years old i think, we're in California. She doesn't have contact with any other dogs besides my fully vaccinated dog. Both spayed. Any ideas??