I've been through two rounds of Fortaz injections with my hogg for her RI. After the first round was done, and she still showed signs of RI, I took her back to the vet. I upped her cool side temps, and did the second round. She was getting better. Today, I took her out to give her the last injection, and her throat was all puffed up, and mucous poured out of her mouth. She opened her mouth a couple of times and shook her head. Needless to say this has me worried and I'll be talking to the vet tomorrow.

Any ideas as to why?