.....can someone give me advice as to why?

My daughter, Kayla, is almost 10 weeks old. She is BF and also has been getting top up feeds with formula. All up she might have 180ml of formula a day. She was on S26 Gold, but when ECHN was here for the home visit, she suggested to use Nestle Nan HA, as it is easier for them to digest (and I get psoriosis from dairy and can not have it, so the ECHN suggested that if Kayla had formula, to use the Nan HA, as she is less likely to get a reaction from it :-k ). We were only giving Kayla maybe one bottle of formula every 3 days, so we stuck to just buying the S26 sachets. But then she started feeding every 2-2.5hrs and was still a bit upset. We would try her with a bottle 20min after a feed and she would scoff it down. Obviously my milk is not enough for her. So we figured that if she was going to have formula everyday, that we might aswell buy a tin, so we bought Nan HA.

She has been having Nan HA for about now smell extremely eggy (quite embaressing really )

Anyway, getting to the point, she poos maybe every 3 days, which I have heard is normal, but the last two poos she did have been greenish.

Could this be due to her fromula or could it be something else?

She is happy and the poo is a normal soft consistancy (not dioharrea), and she seems to be putting on an average of 20g per day.

We were at the docs on Friday due to a blocked tear duct, and I asked about her smelly farts, discussed formula etc. She asked whether her poos are green. I said no, because at that time they weren't. She said that's good because it could be a sign of malnutrition.

Can someone maybe help?

Thanks