Thanks a lot for your replies - Like you all suggested Prednisone seemed to be causing the bitter taste. He now gulps it down with a glass of water after his meal and it has seemed to help.
Dan we are surely happy about
the PSA drop and are hoping and praying for an undetectable next time around. Fingers crossed. and that zytiga can control the beast for years to come. Its just that this disease creates such a mental havoc that at the mention of any minor untowardly thing happening or symptom unheard of, the brain tends to overwork itself and link it to the beast unleashing itself causing worry. I am so glad that there is this forum and you guys are here to help to put the mind at rest