Sounds good, they say that you can feed them until she's 10 months.
I never fed Beaphar honestly but I know Hermelin
https://www.rabbitsonline.net/members/hermelin.23610/ uses them with her mini lop not sure which ones though she said she was very happy with them.
I can tell you from my experience with juniors, I feed unlimited pellets until 4-4,5 months then start limiting otherwise they start gaining more weight. But your pellets don't have alfalfa at all.
I would agree with JBun one of poos in your photo looks like crushed fecal poo, it is hard to say for other ones, sometimes cecals come not fully formed as brown paste, I had one rabbit with GI problem when I adopted him, his cecals were exactly brown and soft not like we know them. He is well now and I never see his cecals but they were as you describe. He had horrible problems and nearly died his poos were also very tiny and deformed. From your description and photo of her normal poos she looks healthy and your diet sounds healthy. Maybe try massaging her belly if you think there could be any problem like bigger poos but her fecal poos would be also deformed if she had blockages.
So she has those soft big poos one per day for how long? I am not familiar with other health problems JBun mentioned like liver issues etc hopefully it's nothing serious.
There's nothing I could recommend to change in her diet if you say she eats lots of hay, drinks lots of water, it all sounds good to me. Maybe other member will know more, I'd just keep watching her if situation gets worse but hopefully there's nothing wrong with her
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Composition:
Vegetable by-products (Timothy Hay 53%, herbal hay 10%, 5% chicory, Inulin 0.2%, yucca schidigera 0.05%, grape seed extract 0.01%), seeds, vegetable protein extracts, fruits (apple 5%) , minerals, oils and fats, Seaweed (spirulina powder 0.01%).
Additives/kg: Oregano: 120 mg.
Nutritional additives/kg: Vitamin A 9.000 IU, Vitamin D3 1000 IU, Vitamin E 100 IU, Vitamin C 350 mg, Vitamin K3 8.9 mg, Vitamin B1 20 mg, Vitamin B2 26 mg, Vitamin B6 23 mg, Vitamin B12 77 mg, niacin 130 mg, pantothenic acid 50 mg, biotin 660 mg, folic acid 3.5 mg, choline 1300 mg, E2 I (iodine) 1.53 mg, E4 Cu (copper) 12 mg, E5 Mn (manganese) 30 mg, E6 Zn (zinc) 60 mg, E8 Se (selenium) 0.06 mg.