I've never heard that dogs can't taste....although I dont' think mine DOES taste...he inhales EVERYTHING.....canned dog food, dry dog food, any type of chicken or veggies or fruits I give him, egg whites...oh... not to mention cigarette filters that he picks up from heaven only knows WHERE since nobody smokes anywhere near our home, (otherwise, how would he be able to swallow them WHOLE without me knowing he had something in his mouth
)...and you can imagine how I know this, LOL.
My uncle's dog would do anything for green beans, and he won't act like that for any other food, so they must be able to taste!