How often should I change my canary's pellets to ensure they're fresh?

As long as Ringo seems active and healthy, feeding him his regular food should be fine, assuming it's a balanced diet. Most commercial bird foods are formulated for optimal nutrition, and should be fine to give Ringo as he finishes the last of his molt. You can still offer the other items as treats, if you'd like.

This is likely regurgitation and not vomiting. Birds normally do this from time to time for various reasons, so I wouldn't worry too much about this. If he starts to do it more frequently, then I would be more concerned and recommend a vet evaluate him. For more information about this, I recommend you read the information at the link below. https://everythingbirdsonline.com/care-feeding/regurgitation-vs-vomiting/ I hope that helps and all is well with Ringo.

I am assuming she was on a seed mix diet before, this is completely different, you do not need to limit the amount you give her, she needs to have food available all the time during the day, it may take time but this diet will help her loose weight.

Thank you for using Petco Pet Education Center, formerly Petcoach! I recommend providing both grain/seed mix or pelleted feed and fruits/veggies every day. It is not necessary to provide fruit and veggies daily as these are considered enrichment, and not necessary for nutritional requirements. Keep in mind that budgies tend to be neophobic, or do not like new things in their environments, so they may not respond well to new food items. I hope this helps and am happy to answer any other questions you may have!

Harrison's bird food is the best pelleted bird food on the market in my opinion. Most avian vets recommend it and feed it to their own birds. For more information, here is their web address: https://www.harrisonsbirdfoods.com/

The cuttlebone helps to provide the bird with minerals, but they don't really tend to eat it massively. As long as it is available in the cage the bird will pick at it as necessary. One cuttlebone could last a small bird years. Ensure you are feeding a good quality seed mix and Ringo should be great.

Thanks for reaching out about Ivy and agree it is often difficult to convert birds to an all pellet diet. Being persistent with him, as you are, and he will eventually come around. Allowing him to be hungry for a few hours should do no harm. Have you tried different brands of pellets as they probably have different tastes, colors, smell, etc. Good luck.