You cannot use yeast that is for baking bread etc. It can swell and cause serious trouble even death.Can you see how fat the crop of the large one is.Morning temperatures are dropping to 15°C and even lower later this week (12°C). Thy are both feathering-up so I'll just make sure they are well fed before they go to bed and hope they won't get cold. They were roaming around in the rain, which makes me think they'll be more than OK. The heat hurts them more than cold, I think.
I use baker's yeast. It's much more available than brewer's yeast around here (I have yet to find it) and has similar nutrition value.
Nutritional value per 100 g (3.5 oz)
Energy 1,361 kJ (325 kcal)
Carbohydrates
41.22 g
Sugars 0 g
Dietary fiber 26.9 g
Fat
7.61 g
Protein
40.44 g
Vitamins
Thiamine (B1)
(956%)
10.99 mg
Riboflavin (B2)
(333%)
4 mg
Niacin (B3)
(268%)
40.2 mg
Pantothenic acid (B5)
(270%)
13.5 mg
Vitamin B6
(115%)
1.5 mg
Folate (B9)
(585%)
2340 μg
Choline
(7%)
32 mg
Vitamin C
(0%)
0.3 mg
Minerals
Calcium
(3%)
30 mg
Iron
(17%)
2.17 mg
Magnesium
(15%)
54 mg
Manganese
(15%)
0.312 mg
Phosphorus
(91%)
637 mg
Potassium
(20%)
955 mg
Sodium
(3%)
51 mg
Zinc
(84%)
7.94 mg
I am glad your putting them up at night so very important to keep them safe from predators. I do see how large the chest is she must have just pigged out on slugs?
As long as they have dry bedding and draft free house they will be fine.