the plastic basket muzzles are nice, something like this...

http://www.amazon.com/dp/B004SHL8OI/ref=asc_df_B004SHL8OI2028584?smid=A35188XA16FALM&tag=pgmp-925-97-20&linkCode=asn&creative=395109&creativeASIN=B004SHL8OI

your dog can drink through this muzzle, if necessary.

i will caution you to one very important thing and that is to TRAIN your dog to the muzzle, don't just slap it on and go. use lots of treats and positive reinforcement and it won't take your dog long to accept it.

another thing is that some dogs (not all) feel vulnerable when they are muzzled in the presence of other dogs, even other dogs that are wearing muzzles. this can cause your dog to become leash reactive (lunging, growling, snarling, etc.) when he encounters other dogs. this behavior is VERY hard to UNdo.

Below is a site with several to choose from, and the one I'd consider is the 'Everyday Light Weight'.
Something that is padded and that protects the dog's tender nose would also be at the top of my list.

As nina mentioned, spend lots of time training her, and start with very short periods of her wearing it.

I'm not sure you'll find much to choose from in the pet stores, so Google to find the many styles available.

Here is a link that might be useful: muzzles

Plastic play muzzles - They can still drink, take treats and PANT to cool themselves. Here's Dannie in her pink muzzle after coursing.

Thanks all!

I guess it's not as horrible a thing as I thought. It's even cute on Dannie!

I think he'll be easy to train. He'll put up with any indignity if it's associated with a walk or a treat. I don't know where I'll find muzzled dogs to practice with. I've never seen one. But I'll ask his boarding/daycare place what they suggest as they also do a lot of training.

Hope these things aren't hard to fit...:P