Only a small problem with any commercial meat bird chick. Most of the larger companies inject the breeding birds, chicks and even eggs with all sorts of stuff to keep them disease free.
I don't know about Hubbards, besides which I'd rather breed and hatch my own then I know what they have been fed on and how they were reared.
HFW used an Indian Game rooster on Light Sussex, Wyandotte and a Dorking. All were traditional crosses and of those 3 tested the Dorking cross was chosen as the best tasteing.
Over many years I have tried them all and found the best cross was Australorp Rooster to Indian Game hens. Australorps are very good laying breed and the roosters are able to mate Indian Game easily, much easier than the other way around. If your worried about the amount of eggs Indians Lay don't be they lay more than enough for eggs to hatch.
Details on breeding for dual purpose I have on my web page.
Australorp/ Indian Game Xrosses 5th generation.