I have a camelbak vest that works great for me and the dog. Quid won't drink from a sport bottle but treats the camel like a hose and laps it right up as i squirt at him... and no slobber on the bite valve so I can drink too.

I like the vest better than the old 'backpak' version I used with my (now deceased) greyhound. It fits nice and snug.

spazz