It's an extremely common myth in the dove community that they cannot eat seeds that are big, sometimes the seeds are anything bigger than millet, other times it's very large seeds like whole peas. This myth is extremely harmful because it ends in a lot of doves not eating a nutritionally balanced diet and eating only seed mixes with small seeds - which are mostly millet-based. That can lead to malnutrition, obesity, liver issues, kidney issues, digestive issues and more all of which can kill a dove in the long term, way before even getting close to the end of its lifespan.
Doves (and pigeons), just like many other birds, have flexible jaws that allow them to swallow food bigger than their beak. When a dove is refusing to eat bigger seeds then the issue isn't that it physically cannot swallow those certain seeds, but it's either just being picky or there's some kind of medical issue (like canker or a blockage) in case the dove was eating the large seeds without any issues before, but suddenly started refusing them. Pickiness can have several causes:
- Feeding doves an inappropriate diet that contains mostly filler seeds/too many seeds that should be used only as treats. Seed mixes high in millet, milo, fatty seeds like sunflower and safflower as well as any corn other than a small amount of popcorn should be avoided. Millet addiction is a common issue with doves which causes them to not want to eat most other seeds.
- Feeding way too late in the day, especially if legumes are the only seeds the doves are refusing to eat. They won't eat legumes in the evening because of their high protein content, requiring heavy digestion - which doves do during the day due to being daytime foraging birds.
- Feeding way more than what doves can eat in a day, causing them to eat only their favorites and leaving the rest of the seeds. A daily dose for one dove is 1-2 tablespoons per day, but it can vary a lot depending on the individual. Their food bowl should always be empty or at least almost empty by the morning, while still having some food in it in the evening.
NOTE: I know Hope has a plucked patch on his neck. He actually had to be separated from the rest of the flock (with friends, he wasn't kept alone) for quite some time because he's a partial imprint and he always gets pretty aggressive during the spring and early summer. I put him back with the rest of the flock just recently because he's so much calmer now and is in the process of molting so he's growing in new feathers. He had to be handraised because otherwise he wouldn't have survived, as a consequence he is much worse at getting along with other doves (both males and females), but he's getting a bit better with every year and he has finally found a mate this year during the time he was separated. I could have just not posted this video, but I think it's good to show the rough reality too.