Poseidon has never been the pooper but when he would go it was alot!!! LOL. But now he wont go for 3 to 4 days straight. I took him to the vet for constipaton, they took x rays and there where no sings of back up. And then they lube in his back end ( the worst thing I ever seen in my life). And after all that the vet tells me that he has no clue what is wrong with poseidon. Could some one please help me and Poseidon