They do a full adjustment on my son (19) months, every time we go in. Back, neck, ears, whatever he needs. We started off with the adjusting tool (clicker) with everything except the ears...that was manual. Then we've moved on to a regular adjustment. As someone with ear problems and as a former Chiropractic Assistant...I can tell you neck adjustments are VERY important. They definitely effect the ears and the rest of his body. I have never needed to see an Osteopath, so I can't answer that specific question.
Probiotics help me immensely with ear problems and my son has taken them from birth.
To answer your second question: Goats milk is good, but it is NOT lactose free. It has superior digestibility, but it does have lactose. I can't drink goat's milk. Be very careful with goats milk, if your child does have milk issues.
“Goat milk is slightly closer in composition to human milk than cow milk is, with proteins that may be easier to digest. It is estimated that 20 to 40% of milk allergic individuals do not react to goat milk. However, milk allergic individuals should obtain an allergy test prior to trialing, as most people who are allergic to cow milk have similar reactions to goat milk. Plus, a rare few are in fact more allergic to [the casein or whey in] goat milk.
The lactose levels in goat milk versus cow milk are very similar (4.1% and 4.7% respectively), so lactose intolerant individuals might experience little to no relief from making the switch.”
If your child can have tree nuts, Almond Milk is a wonderful alternative.