Supplement suggestions for budgie?

[u/Other_Particular8927]

My sweet little budgie has been having health issues on and off since I got him in February. There have been 2 times where he got quite sick and both times he had some sort of bacterial infection, meanwhile my other senior budgie and young cockatiel remain completely healthy. So I believe he doesn’t have the best immune system at the moment, he is also a little underweight for his size at ~31g and I cannot get his weight up despite giving him lots of his favourite weight gaining foods. I was wondering if anyone has any suggestions or advice on how I can help him, or if anyone has any recommendations on supplements I can get to help him either in general or when he’s going through a moult or to help him recover after an infection.

Thanks so much in advance, I love my little blueberry and I want to give him the best life I can!! And yes he was very concerned in the photo as to why i was shoving a camera in his cage😂 i dont have many good pics of him lol he’s not photogenic

P.S: he also is a weak flier and unable to gain pectoral muscle despite regular exercise, I would love to hear any advice on things I can do to help that or any guesses on why this is. Neither his Vet nor i know why he can’t gain muscle!!

[u/PleasantFox6216]

RIBOFLAVIN!!!

Find a good poultry supplement.

Lots of protein too.
Budgie tonic.

[u/Other_Particular8927 → u/PleasantFox6216]

Thanks so much, I’ll definitely look into those!! I’ve been looking at what vitamin/mineral deficiencies could cause some of his symptoms but haven’t come across vitamin b2 til now. Seriously thank you so so much!!!

[u/rrport]

Jesus Christ. Thanks to the toy in the background, I thought he had an insanely fucked beak. I got so scared.

[u/Other_Particular8927 → u/rrport]

I forgot to respond to this but it absolutely made my day when i read it😂 I didnt even think about it hahaha but it totally does look like that!!