How to help my skinny canary regain health and start singing?

How much a bird sings varies greatly on the individual bird so it would be impossible to tell you when he will sing again or not. Making sure he is on a balanced diet, and having your vet take a look to make sure there aren't any lasting health issues caused by the malnutrition earlier is best to make sure Ringo is still healthy and happy.

I've not heard of food alone aiding singing, but the right nutrition can definitely help Ringo feel healthy enough to want to sing. Spending time with him, making sure he's getting enough light, and providing fun toys and other enrichment can also help encourage him as well.

Thanks for your question about Hazlet, and thank you for the photos - they are very helpful. You are correct in that Hazlet is more fluffed than a normal canary should be. You are also correct that this can be a sign of illness (it is part of what we call the "sick bird posture" - this also includes sitting low on the perches or sitting on the ground, closing the eyes, tucking the head, faster breathing). It can also be a sign of stress, or being cold as well. I would recommend that you evaluate where the cage is located - is it near a window, near an outside wall, or near a door? Is the temperature in your house 70F or below - if so, I would recommend increasing the temperature. Now that it has been two days since you posted (I apologize for the delay, by the way), if this has continued and the temperatures and cage location are appropriate, it may be time for a veterinary visit. Often it can take a few days for a bird to get comfortable in their new environment, but if it is still going on now, I would recommend taking him in to see a veterinarian. They can perform a physical examination, and depending on the findings, may have treatment recommendations for you. They can also evaluate the husbandry/care/diet for Hazlet and may make recommendations that are tailored to you and to him. I hope that gives you a place to start, and thanks for using Petco Pet Education Center, formerly Petcoach.

Thanks for reaching out about Silver and including photos. Stress can cause shedding, but also poor nutriton. Lettuce does not have much calcium or other vitamins, nor does cucumber. A wide variety of vegetables (including carrots, yams, brocolli, collards, etc) in addition to a protein source (sprouted seeds, chopped beans) are important for feather growth. Feathers are possible but usually contagious from one bird to another. Improve the diet, provide bathing options. Good luck.

Molting can last 6-12 weeks. Some canaries will complete a molt outside this time frame though. Increase proteins and fats to aid feather regrowth. Flax, niger and hemp seeds can be offered. Protein can be in the form of scrambled eggs or small crickets and mealworms. Bathe or mist with warm water to promote preening and healthy plumage. Providing full spectrum lighting, avoiding stress, limiting daylight to 8-10 hours and keeping room temperature between 68 F and 70 F will aid in molting.

This definitely sounds like something other than molting, especially if he's very lethargic or showing other signs of illness. I would bring him into your vet for a complete exam and even possible bloodwork to rule out issues such as parasites, infections, illnesses or even nutritional deficiencies that may be causing it. Making sure to keep him warm with easy access to a balanced diet and water may help some until you can be seen by your vet.

Make sure she has a balanced diet consisting of a pelleted diet, a fortified seed mix and small amount of fresh greens, fruits and vegetables. Provide a mineral block and/or cuttlebone. You can provide a birdbath or mist her with warm water a couple times a week to promote preening and healthy plumage.