We recently got 2 bottle calves, approximately 2 weeks old now. For the first 5 days both calves were doing great and taking 1/2 a bottle 2x a day still wanting more. The last 2 days one calf has been not wanting to suckle. He will start to drink his bottle then about a minute later pull away and lose interest. Every couple minutes I can get him to drink a tiny bit more, but he at most will drink 1/4 of the bottle. He is not lethargic at all, still up and moving around. He does sound a bit congested like he may have a harder time breathing while sucking. The other calf does keep trying to suck on his ears (we are working on a solution but are unsure if it could be related). Anyone experienced something similar? Any advice??