Sorry if this should be posted elsewhere, it's not really an emergency, but wasn't sure if the nutrition forum was where I should post this or here, if I need to move it please let me know! 
I have a little crossbeak chick that is a couple of months old. The last couple of weeks he has been unable to feed himself adequately and has lost weight and been lethargic. I started tube feeding him and he is making improvements. My question is - how long should it ideally take for their crop to empty? I am finding that sometimes his crop stays full the majority of the day from his morning feeding. it is soft, not impacted, but I just really thought that as small as he is, his crop should be emptying faster than that. All day seems a little sluggish to me, but may be normal, I have never had to exclusively tube feed before so I am unsure! I just need a good reference point to see how he stacks up compared to a normal healthy chick. Not sure if maybe @casportpony has a handy chart she could share, or if anyone else has an idea of about how often a crop should empty? Thank you in advance!!

I have a little crossbeak chick that is a couple of months old. The last couple of weeks he has been unable to feed himself adequately and has lost weight and been lethargic. I started tube feeding him and he is making improvements. My question is - how long should it ideally take for their crop to empty? I am finding that sometimes his crop stays full the majority of the day from his morning feeding. it is soft, not impacted, but I just really thought that as small as he is, his crop should be emptying faster than that. All day seems a little sluggish to me, but may be normal, I have never had to exclusively tube feed before so I am unsure! I just need a good reference point to see how he stacks up compared to a normal healthy chick. Not sure if maybe @casportpony has a handy chart she could share, or if anyone else has an idea of about how often a crop should empty? Thank you in advance!!