I got a call at work from my husband one afternoon and he told me to come home right away, that something was wrong with our first dog, Max. I got home and ran in the house and saw my boy with his head so swollen that his eyes were slits. I gave him a benedryl but was still afraid, so we took Max to one of those emergency hospitals. I think they gave him several injections and asked us to wait so they could make sure he was OK. The vet asked what happened and we didn't know, there had been no change in food or anything like that. She said it was probably bee sting (s), that her own dog had eaten a bee and reacted like Max. She advised me to always keep benedryl on hand and if something like that happened again, to give several rather then one. She told me some incredible amount (don't remember exactly how many) that he could safely have in a day, based in his body weight which was 90 pounds.