Baby bunny with cream colored poop!!! Help plz!

[Siskellery]

I have a baby bunny that is 12 days old. He is a mini Rex and was the runt of the litter. He is half the size of his litter mates. I am currently bottle feeding him and I have been since day 3. I am feeding him a a mix of goats milk and goats milk powder and I am adding Bene-bac plus to help his gut. He is very interested in eating. He has been gaining very little weight and is super skinny. I just noticed his poop is solid but is a creamy color. I will post pictures below. The last pic is if him the day he was born compared to now.
I guess my questions are-
Is there any chance of survival for him?
How can I help him gain more weight without over feeding?
has anyone raised a runt so small?

 

[Siskellery]

And what does the color of the poo mean???

 

[Isaac 0]

We'll see if @Bunnylady , or @oldhenlikesdogs , can help.

 

[Siskellery]

Thanks!

 

[oldhenlikesdogs]

I'm sorry I can't be of help. I've never had to bottle feed a baby bunny. I also don't know what color their poop is. I would assume that's normal because it's milk color. Hopefully Bunnylady comes along and helps.

It sure is a cute little thing. It appears to be growing, and looks fed.

 

[Siskellery]

Ok thanks!

 

[Cinnamon11]

I’m not sure I’ve never had a bunny do that but I do have to say your babies are super cute!!!!

 

[Siskellery]

Thanks!

 

[Cinnamon11]

Thanks!

Of course! I have 3 lionhead Flemish giant crosses (sadly the parents got killed by my friends dog )

 

[Siskellery]

Aww I’m sorry!