Is it okay to switch to soy formula if the baby has a protein allergy to animals?

Patient's question:

My child has a sensitive constitution, and at 3 months old, he suffers from eczema and asthma bronchitis. Could you please answer the following questions?
1. If I want to rule out his allergen as animal protein, can I switch to soy formula?
2. If the child's allergen is animal protein, will switching to soy formula improve his bronchitis? Is bronchitis caused by a viral infection or allergies? (I know that eczema and asthma will improve.)
3. Does colostrum contain animal protein? I'm considering giving my child colostrum as a supplement because I'm concerned about the nutritional content of soy formula.
Thank you!

Doctor's answer:

This is the standard treatment method, which can also ensure the baby's nutritional intake. Milk allergy sufferers are highly allergic to goat milk at a rate of 92% and to soy milk at 60%. For babies with milk allergies, it is essential to switch from regular formula milk to amino acid formula or extensively hydrolyzed formula. When starting to introduce solid foods, you can first try some plain rice porridge or similar foods, as well as carrots puree, which are less likely to cause allergies. When introducing a variety of solid foods to your baby, start by giving a few spoonfuls and wait for a reaction before continuing to add more.

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