I have a 7 week old bottle calf, been doing great. She has been on grass and eating calf creep for about 3 weeks. Doing great, great appetite. But today, she did not want her bottle. I noticed her poop was pellets instead of patties and she did not eat any of her calf creep. I did give her about half a bottle of milk, but she was not enthusiastic about it at all. Her tummy looks a little full, but not bloated, just full. I gave her a dose of probiotics and a teaspoonful of mineral oil. She is not her usual ball of fire. Any suggestions?