We took these in and asked our veterinarian about them. She said they're a very good idea for a nursing dog to prevent bone deterioration. The main thing she said is important is the calcium, and the other ingredients she simply said were safe. When your dog is nursing, especially with a large litter, they create a lot of milk, and calcium goes into making that milk, and if the dog doesn't have enough calcium in her diet, it can use the calcium in her own bones to produce the milk, so giving a dog a calcium supplement while nursing can be important to protect them.
Our puppies aren't due for a couple more months, but we took the chews into the vet to get her opinion on them, and we opened them up and gave one to our dog to see what she thinks. The vet approves, and the dog thinks they taste great, and had no perceivable digestion problems, so these look like they'll be perfect.
The chews recommend 2 chews per day for our medium sized dog, and nursing generally lasts 5-6 weeks, so this 100 chew container should last us through a full pregnancy. A larger dog might require more than one bottle.
My only real complaint - and the vet shared this - is that the font on the bottle is very hard to read. Small print with pink on pink for the ingredient list, both myself and the vet had to find a very brightly lit area to be able to read the ingredients and directions. I'll just list those here, so you don't have to struggle to read it.
Copied directly from the container.
Active ingredients per Soft Chew (Approximately 2.5g)
Motherwort Extract 120 mg
Astragalus Root Extract 100 mg
Dandelion Extract 100 mg
Calcium 33.2 mg
Inactive ingredients
Chicken liver powder, Oat flour, Chickpea flour, Tapioca starch, Vegetable glycerin, Yeast hydrolysate, Coconut oil, Chicken fat, Natural meat flavor, Vitamin D3, Citric acid
Directions for use
Begin with half the suggested amount, and gradually increase to the suggested daily amount. Amounts can be split between AM and PM.
Daily Amount
Up to 25 lbs. - 1 Chew Daily
26-50 lbs. - 2 Chews Daily
51-75 lbs. - 3 Chews Daily
Over 75 lbs. - 4 Chews Daily
Warnings
For dogs use. Keep out of reach of children and other animals. Do not feed puppies under 12 weeks old. Consult a veterinarian before feeding pregnant or nursing animals. To ensure freshness, store in a tightly sealed container at room temperature. Keep out of direct sunlight. Once opened, consume within 6 months.