Marshall (6 month old I just got yesterday) has been fitting in great, except one thing isn't right... He cries everytime he poops and gets really upset...and the poop looks like it's really hard. It also looks like he might've been eating pebbles?? The people I got him from had a pebble walk way, that's probably where he ate them at? I have an appointment in a few days (they're booked up until then) so I can't take him in just yet. And the vet said he'll be fine just make sure he has enough to drink and if it gets worse to call immediately.... I'm just worried. He acts like it's really hurting him. /: he eats Science Diet large breed puppy. I was going to start changing him over to something better once he's settle in.