Year and a half old Staffordshire ate a plastic bottle (Mt. Dew). Now, he's having trouble when he's trying to poop. He's trying, But nothing's coming out. He's still playful & eating. But, he feels like he might have a bit of a fever. Should I give him some kind of laxative or veggie oil? Or, Does he need to go see the Vet? I'm just worried about my boy. Thank You.