It could be as simple as constipation. For the next 3 days feed only cooked, deshelled, frozen pea's. I cook mine in a cup of water for around 2-3 minutes. I let them sit in the hot water about 10-15 more minutes. Drain them, and pop the pea out of the shell. When adding to the tank I lightly smush them. My rams eat pea's like candy.