Here is the information I have that I got from a friend who is NOT a vet but very knowledgable about dogs (just my disclaimer 
)
.5-2mg(MAX) per lb(of your dogs weight) every 8 hours. My bendryls are 25mg capsules.
I have found that just giving one benedryl when Sammy's eyes are extra red seems to help a lot and lasts a while. I would give as little as possible... the smallest amount that works. No need to over-medicate.
Also, make sure you are around for a while after you give it so that you can see how the dog reacts to it. Most likely he will be a little sleepy, but I have had a friend who's dog gets extra hyper from benedryl so I guess every dog is different. I would start with 1-2 per day and see if that helps.
).5-2mg(MAX) per lb(of your dogs weight) every 8 hours. My bendryls are 25mg capsules.
I have found that just giving one benedryl when Sammy's eyes are extra red seems to help a lot and lasts a while. I would give as little as possible... the smallest amount that works. No need to over-medicate.
Also, make sure you are around for a while after you give it so that you can see how the dog reacts to it. Most likely he will be a little sleepy, but I have had a friend who's dog gets extra hyper from benedryl so I guess every dog is different. I would start with 1-2 per day and see if that helps.
