Why is my lovebird rubbing its butt and eating regurgitated seed?

Check her vent for redness or swelling. Monitor for loose droppings. Submit a sample to your veterinarian to diagnose intestinal parasites or bacterial overgrowth. If she is of egg laying age, have her physically examined by your vet or an experienced avian vet to diagnose or rule out being egg bound.

Have Sky examined by your veterinarian or an experienced avian vet to diagnose illness or injury. You can also move the cage away from direct sunlight and limit daylight hours using a cage cover. This may stop his mating behavior if that is what it is. Limit any interaction, such as beak wrestling, that may foster mating behavior as well.

Birds can sometimes begin to regurgitate or share food if they're feeling in a "lovey" or mating mood. It may be that he is considering you a potential mate. It'd be best not to encourage the behavior if this is the case, and to try and interact with him in other ways, such as offering a toy to play with, walking away when he attempts it etc. If you're seeing any other symptoms such as changes in eating habits, stool changes, listless behavior, etc, then it could indicate something beyond just behavioral, and scheduling a vet checkup is always a good idea.

He may be regurgitating for you. It is characterized by an up and down pumping motion of the head as you described. This is normal. Mino is trying to get food/seed up to share with you. Consider it a high compliment from your feathered friend! As long as he is behaving normally otherwise (no lethargy, loss of appetite or loose droppings), there is likely no cause for concern.

Often they regurgitate (not vomit) their food when they are in the presence of a friend or mate. It's a way for them to show off. If you have a particularly close relationship with your parrot, then this could explain the behavior; especially if it's something he does regularly. They can also do it more often during breeding seasons. There are a couple of different diseases of the gastrointestinal tract that can also cause frequent regurgitation, so it's best to have him checked out by an avian vet if this suddenly started occurring. If you are suspicious that it's more behavioral, then you may consider altering how you interact with your parrot. This is especially important when it comes to touching your parrot. In the wild, friends will only touch around the head and neck, while mates will touch areas below the neck, like under the wings and belly. Essentially, you'll want to give a little distance between you and the parrot. If that stops the regurgitating, then you'll know that's the problem. I hope that helps and all goes well with your Ringneck.

Birds do not recognize themselves in the mirror, so this would explain the mating behavior of regurgitating. I know it looks somewhat concerning, but it is more of a behavioral thing and is not concerning from a medical standpoint. If she seems more hormonal (like she's displaying a lot of mating behaviors), then you should expect this to pass within a few weeks. Unfortunately, there is not much you can do to stop her from doing this at this time...you'll have to just wait for this phase to pass. If she doesn't seem to be keeping any food down or is continuing the behavior for longer than a month, then it's best to have a vet check her out. There are a few different infections and conditions that cause chronic regurgitation, so it would be good to rule these out as a cause.

What a cute name. The toyslook great to me. You are 100% correct that birds will regurgitate on things to mark them. It is a sign of marking you. However it takes time for bird to feel safe. Just keep doing what you are doing and give to a little more time.