I thought I would list some information for "Gallery Talk". 

Do you have a dog that seems hot all of the time? Do you test his/her skin to make sure they are hydrated? Some folks use Pedialyte mixed in their water, others use soup broth. Me personally use a product that I ordered from amazon(K9dog power).  Also "Replenish" makes a product in individual packets.

Would my dog, enjoy a little electrolytes? After all he's doing the running! With summer temps, or all day hunting, hydration is not just for you!  I know that I feel good after drinking a Gatorade, when I'm training or testing. 

However I will disclose that Marin Retriever Club does not promote or discourage some products, this is a topic for discussion:  Hydration for Dogs

Here is an article for some free reading, however the highlights are worthing capturing:

*skin Test  *use a squeeze bottle  * Bait the water  *Float their food

https://www.purinaproclub.com/articles/how-keep-your-bird-dog-hydrated-field     

Happy Training and Testing....