The reaction your dog had probably wasn't as serious as you thought and he may not be that allergic, its normal to have some swelling from bee stings.He may of just been attacked by a swarm of yellow jackets or something like that and received several stings to the head.I would just let the dog build up a natual resistance to the stings.I'm not really sure giving Antihistamines or anything that prevents the body from building up a resistance is a good idea unless it really is serious and life or death JMO.

If he was stung by a bee the homeopathic remedy Apis will help, put three on his tongue and make him swallow them. If he is eating fly and spiders I wouldn't worry, makes it less for you to deal with (lol) I have a dog who hates flies and bees always chasing them and eating them. Good! less for me to swat

Hi my dog keeps eating bees and now she hasnt eaten for 3 days just drinking she has been sick but its just yellow fluid can any1 help thanks

Minnie, take the dog to the vet!